Comets « Comet Section

February 4, 2023 – ALPO Comet News for February 2023

C/2022 E3 (ZTF) is at its best as February starts. Several observers have made naked eye detections during the last week of January. At between magnitude 4.6 and 5.1, ZTF is a very easy binocular object but will require dark skies to be seen with the naked eye. With a close approach to Earth at 0.29 au on February 1, the comet should fade rather rapidly in February and may be as faint as magnitude 8 by the end of the month. Though fading, its southern motion will allow southern mid-latitude observers a chance to see it early in the month.

C/2022 E3 (ZTF) is not the only reasonably bright comet. In the southern hemisphere, C/2017 K2 (PANSTARRS) is at 8th magnitude. Northern observers will also be able to follow 9th magnitude comets C/2020 V2 (ZTF), C/2022 A2 (PANSTARRS), and C/2022 U2 (ATLAS). While C/2020 V2 (ZTF) and C/2022 A2 (PANSTARRS) are limited to northern observers, C/2022 U2 (ATLAS) will be visible from the southern hemisphere as well.

Last month’s brightest comet wasn’t C/2022 E3 (ZTF) but rather 96P/Machholz at 0th to 2nd magnitude. Unfortunately, it was only visible through the eyes of the SOHO and STEREO-A spacecraft as it was only a few degrees from the Sun at its brightest in late January. Eagle eyed observers with a clear horizon may spot 96P later in the month low in the morning sky though it should have faded to 8-10th magnitude by then.

Last month the ALPO Comets Section received 83 magnitude estimates and 122 images/sketches of comets C/2022 U2 (ATLAS), C/2022 P1 (NEOWISE), C/2022 E3 (ZTF), C/2022 A2 (PANSTARRS), C/2021 Y1 (ATLAS), C/2021 X1 (Maury-Attard), C/2021 QM45 (PANSTARRS), C/2020 V2 (ZTF), C/2020 S4 (PANSTARRS), C/2019 U5 (PANSTARRS), C/2019 L3 (ATLAS), C/2017 K2 (PANSTARRS), 96P/Machholz, and 29P/Schwassmann-Wachmann. A big thanks to our recent contributors: Michael Amato, Dan Bartlett, Michel Besson, Todd Bossaller, Denis Buczynski, J. J. Gonzalez, Jose Guilherme de Souza Aguiar, Christian Harder, Carl Hergenrother, Eliot Herman, Rik Hill, Michael Jäger, Martin Mobberley, Charles Morris, Mike Olason, Phill Parslow, Ludovic Perbet, Uwe Pilz, Allan Rahill, Efrain Morales Rivera, Gregg Ruppel, Anaël Semiat, Richard Schmude, Jr., Chris Schur, Greg T. Shanos, and Chris Wyatt.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

December 4, 2022 – ALPO Comet News for December 2022

December sees our focus shift to comet C/2022 E3 (ZTF). It is very possible that this comet will be the brightest comet in 2023. While not expected to be a Great Comet, it should become a nice borderline naked eye object in January and February. Unlike many comets that are at their best close to the horizon in twilight, ZTF will be placed high up in a dark sky, first for northern hemisphere observers and then starting in February for the southern hemisphere.

This month, ZTF is a rapidly brightening object starting the month around magnitude 8.6 and finishing the year around 6.9. If it continues its recent brightening trend, it could be a 4th magnitude object at its best.

A few more comets are expected to be brighter than magnitude 10 in December. Northern hemisphere observers can observe C/2020 V2 (ZTF) at 9th magnitude and C/2022 A2 (PANSTARRS) at 9-10th magnitude while southern observers have C/2017 K2 (PANSTARRS) at magnitude 8.

Among the fainter targets, 29P/Schwassmann-Wachmann has once again experienced a series of major outbursts and is currently a 11th magnitude object near opposition in Gemini/Auriga.

Last month the ALPO Comets Section received 95 magnitude estimates and 42 images/sketches of comets C/2022 P1 (NEOWISE), C/2022 E3 (ZTF), C/2022 A2 (PANSTARRS), C/2021 Y1 (ATLAS), C/2021 X1 (Maury-Attard), C/2021 T4 (Lemmon), C/2021 E3 (ZTF), C/2020 Y2 (ATLAS), C/2020 V2 (ZTF), C/2019 L3 (ATLAS), C/2017 K2 (PANSTARRS), 119P/Parker-Hartley, 118P/Shoemaker-Levy, 117P/Helin-Roman-Alu, 107P/Wilson-Harrington, 81P/Wild, 73P/Schwassmann-Wachmann, 61P/Shajn-Schaldach, and 29P/Schwassmann-Wachmann. A big thanks to our recent contributors: Dan Bartlett, Todd Bossaller, Denis Buczynski, Jef DeWit, J. J. Gonzalez, Jose Guilherme de Souza Aguiar, Christian Harder, Carl Hergenrother, Martin Mobberley, Uwe Pilz, Gregg, Ruppel, Tenho Tuomi, and Chris Wyatt.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

November 2, 2022 – ALPO Comet News for November 2022

November is sort of a transition month. For northern observers, we lost C/2017 K2 (PANSTARRS) and C/2022 P1 (NEOWISE). Even down south, K2 is becoming a more difficult object to observe as it approaches conjunction. And we await next year’s bright comets, C/2020 V2 (ZTF) and C/2022 E3 (ZTF), which are just on the verge of being bright enough for most small aperture observers.

November sees the return of two comets that dropped out of last month’s focus. 73P/Schwassmann-Wachmann was supposed to be faint at 14-15th magnitude but a recent outburst has it back at 10-11th magnitude. C/2019 L3 (ATLAS) has recently been re-observed and is still a 10th magnitude object.

Rounding out the comets expected to be brighter than 12th magnitude this month are two short-period comets, 81P/Wild and 118P/Shoemaker-Levy. Both will be around 11th magnitude.

Last month the ALPO Comets Section received 76 magnitude estimates and 33 images/sketches of comets C/2022 R2 (ATLAS), C/2022 P1 (NEOWISE), P/2022 L3 (ATLAS), C/2022 E3 (ZTF), C/2021 Y1 (ATLAS), C/2021 X1 (Maury-Attard), C/2021 T4 (Lemmon), C/2021 QM45 (PANSTARRS), C/2021 E3 (ZTF), C/2020 Y2 (ATLAS), C/2020 V2 (ZTF), C/2020 S4 (PANSTARRS), C/2020 K1 (PANSTARRS), C/2019 O3 (Palomar), C/2019 L3 (ATLAS), C/2017 K2 (PANSTARRS), 404P/Bressi, 327P/Van Ness, 244P/Scotti, 150P/LONEOS, 117P/Helin-Roman-Alu, 81P/Wild, 73P/Schwassmann-Wachmann, 29P/Schwassmann-Wachmann, 22P/Kopff, 12P/Pons-Brooks, and 2P/Encke. A big thanks to our recent contributors: Dan Bartlett, Denis Buczynski, J. J. Gonzalez, Jose Guilherme de Souza Aguiar, Christian Harder, Carl Hergenrother, Eliot Herman, John Maikner, Martin Mobberley, Uwe Pilz, Tenho Tuomi, and Chris Wyatt.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

October 3, 2022 – ALPO Comet News for October 2022

Much of this month’s comet action is shifting to the south. The brightest comet in the sky remains C/2017 K2 (PANSTARRS) at 8th magnitude though it is already lost to observers at northern mid-latitudes by early in the month. C/2022 P1 (NEOWISE) should peak around 9th magnitude early in the month. Though visible from both hemispheres it is a much easier site the further south one is. Looking ahead, C/2022 E3 (ZTF) is rapidly brightening from 11th to 10th magnitude and the prospects of it becoming a bright 5th magnitude object early next year still looks good.

Last month the ALPO Comets Section received 81 magnitude estimates and 20 images/sketches of comets C/2022 P1 (NEOWISE), C/2022 E3 (ZTF), C/2020 V2 (ZTF), C/2020 K1 (PANSTARRS), C/2017 K2 (PANSTARRS), 422P/Christensen, 395P/Catalina-NEAT, 378P/McNaught, 327P/Van Ness, 286P/Christensen, 285P/LINEAR, 276P/Vorobjov, 259P/Garradd, 238P/Read, 196P/Tichy, 157P/Tritton, 127P/Holt-Olmstead, 117P/Helin-Roman-Alu, 95P/Chiron, 73P/Schwassmann-Wachmann, 61P/Shajn-Schaldach, 57P/du Toit-Neujmin-Delporte, 51P-D/Harrington, 44P/Reinmuth, 39P/Oterma, 29P/Schwassmann-Wachmann, 22P/Kopff, 12P/Pons-Brooks and 2P/Encke. A big thanks to our recent contributors: Dan Bartlett, J. J. Gonzalez, Jose Guilherme de Souza Aguiar, Christian Harder, Carl Hergenrother, Eliot Herman, Michael Jäger, John Maikner, Martin Mobberley, Uwe Pilz, Tenho Tuomi, and Chris Wyatt.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

September 1, 2022 – ALPO Comet News for September 2022

C/2017 K2 (PANSTARRS) continues to dominate the attention of comet observers. It is currently the brightest comet in the sky at around magnitude 8, a position it should hold for a couple more months. Unfortunately for those at northern latitudes, September will probably be the last month to observe C/2017 K2 before it is lost in the glow of dusk. Southern observers will be able to follow the comet without interruption for many months to come.

Five other comets will be brighter than magnitude 12 though all may be fainter than magnitude 10.5 to 11.0. 73P/Schwassmann-Wachmann continues its habit of shedding secondary nuclei and so far, 5 new ones have been reported (though all are faint at 17-19th magnitude). C/2019 L3 (ATLAS) should return to view after its solar conjunction, first for southern observers, and later in the month for the northern hemisphere. C/2020 V2 (ZTF) and C/2022 E3 (ZTF) will brighten to around magnitude 11 by the end of September but will both get even brighter in 2023. Finally, C/2022 P1 (NEOWISE) is a brand-new discovery and due to its very rapid rate of brightening may be a 11th magnitude object this month.

Last month the ALPO Comets Section received 60 magnitude estimates and 38 images/sketches of comets C/2022 L1 (Catalina), C/2022 E3 (ZTF), C/2021 E3 (ZTF), C/2020 V2 (ZTF), C/2020 R7 (ATLAS), C/2020 K1 (PANSTARRS), C/2019 U5 PANSTARRS), C/2019 T4 (ATLAS), C/2017 K2 (PANSTARRS), 285P/LINEAR, 117P/Helin-Roman-Alu, 116P/Wild, 73P/Schwassmann-Wachmann, 29P/Schwassmann-Wachmann, and 22P/Kopff. A big thanks to our recent contributors: Dan Bartlett, Denis Buczynski, J. J. Gonzalez, Jose Guilherme de Souza Aguiar, Christian Harder, Carl Hergenrother, Eliot Herman, Michael Jäger, Gianluca Masi, Martin Mobberley, Uwe Pilz, Michael Rosolina, Tenho Tuomi, and Chris Wyatt.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

August 2, 2022 – ALPO Comet News for August 2022

Summary

This month’s ALPO Comet News will be shorter than usual. Basically, I’ve been having trouble finding the time to support the production of these reports. To lighten the work load a bit, I am only highlighting comets brighter than magnitude 12.0 rather than 13.0. So, a few comets from the past few months which might be expected to be discussed in these pages have been dropped. The upside is this issue is actually going out on the 1st of the month (OK, the 2nd for posting on the ALPO site)!

C/2017 K2 (PANSTARRS) is near its peak brightness this month at around magnitude 8. Northern hemisphere observers only have another month or two to observe it before it travels too far south. Southern observers will be able to continue observing K2 for a long time to come. Among the fainter comets, 73P/Schwassmann-Wachmann has split once again. Michael Jäger has reported on the comet-ml list that at least two faint 19th magnitude secondaries have been imaged. With 73P reaching its peak brightness at ~11th magnitude at the end of August, perhaps a few more secondaries will be detected.

C/2022 E3 (ZTF) will be around 12th magnitude this month. The comet is continuing to brighten at a healthy rate increasing confidence that it will become a nice binocular or even borderline naked eye object early next year.

In June the ALPO Comets Section received 72 magnitude estimates and 36 images/sketches of comets C/2022 E3 (ZTF), C/2020 V2 (ZTF), C/2020 R7 (ATLAS), C/2020 K1 (PANSTARRS), C/2019 U5 (PANSTARRS), C/2019 T4 (ATLAS), C/2017 K2 (PANSTARRS), 426P/PANSTARRS, 377P/Scotti, 291P/NEAT, 117P/Helin-Roman-Alu, 73P/Schwassmann-Wachmann, 61P/Shajn-Schaldach, 22P/Kopff, 12P/Pons-Brooks, and 9P/Tempel. A big thanks to our recent contributors: Dan Bartlett, J. J. Gonzalez, Jose Guilherme de Souza Aguiar, Christian Harder, Carl Hergenrother, Eliot Herman, Michael Jäger, John Maikner, Martin Mobberley, Charles Morris, Uwe Pilz, Raymond Ramlow, Michael Rosolina, Gregg Ruppel, John D. Sabia, Chris Schur, Tenho Tuomi, and Chris Wyatt.

I’d like to especially thank Charles Morris and Jose Guilherme de Souza Aguiar who have agreed to contribute their observations to the ALPO. Both Charles and Jose were prolific past contributors and we welcome them back!

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

July 7, 2022 – ALPO Comet News for July 2022

Summary

The comet of the moment is C/2017 K2 (PANSTARRS). Currently around 8th magnitude, C/2017 K2 has become an interesting object for both visual and imaging observers. While K2 is visible from both hemispheres, the second brightest comet of the month, C/2021 E3 (ZTF) at 9-10th magnitude, is solely a southern hemisphere object. A number of fainter comets are in the 10th to 13th magnitude range, including 22P/Kopff, 73P/Schwassmann-Wachmann, 169P/NEAT, C/2019 L3 (ATLAS), C/2019 T4 (ATLAS), C/2020 V2 (ZTF), C/2021 P4 (PANSTARRS), and C/2022 E3 (ZTF). C/2022 E3 is still looking like it will become a nice borderline naked eye object in 2023.

In June the ALPO Comets Section received 52 magnitude estimates and 34 images/sketches of comets C/2022 L2 (ATLAS), C/2022 E3 (ZTF), C/2021 P4 (ATLAS), C/2021 F1 (Lemmon-PANSTARRS), C/2021 E3 (ZTF), C/2021 A1 (Leonard), C/2020 V2 (ZTF), C/2020 R7 (ATLAS), C/2020 K1 (PANSTARRS), C/2019 U5 (PANSTARRS), C/2019 T4 (ATLAS), C/2017 K2 (PANSTARRS), 337P/WISE, 327P/Van Ness, 325P/Yang-Gao, 287P/Christensen, 117P/Helin-Roman-Alu, 116P/Wild, 73P/Schwassmann-Wachmann, 45P/Honda-Mrkos-Pajdusakova, 22P/Kopff, and 12P/Pons-Brooks. A big thanks to our recent contributors: Dan Bartlett, John Chumack, J. J. Gonzalez, Christian Harder, Carl Hergenrother, Eliot Herman, Michael Jäger, John Maikner, Martin Mobberley, Michael Phillips, Uwe Pilz, Raymond Ramlow, Michael Rosolina, Gregg Ruppel, John D. Sabia, Chris Schur, Tenho Tuomi, and Chris Wyatt.

In addition to observations submitted directly to the ALPO, we occasionally use data from other sources to augment our analysis. We would like to acknowledge with thanks observations submitted directly to the ALPO as well as those originally submitted to the International Comet Quarterly, Minor Planet Center, and COBS Comet Observation Database. We would also like to thank the Jet Propulsion Laboratory for making available their Small-Body Browser and Orbit Visualizer and Seiichi Yoshida for his Comets for Windows programs that are used to produce the lightcurves and orbit diagrams in these pages. And last but not least, we’d like to thank Syuichi Nakano and the Minor Planet Center for their comet orbit elements, the asteroid surveys and dedicated comet hunters for their discoveries, and all of the observers who volunteer their time to adding to our knowledge of these amazing objects.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

June 7, 2022 – ALPO Comet News for June 2022

Summary

To borrow from Mark Twain, the reports of C/2021 O3 (PANSTARRS)’s demise was an exaggeration. The comet is much fainter than hoped for at 12th magnitude but well placed for northern observers. While C/2021 O3 did not become the bright object we expected, another comet, 45P/Honda-Mrkos-Pajdusakova, is running about 3 magnitudes brighter than expected (starting around 8th magnitude and fading to 10th this month) low in the evening sky. Two other comets will be brighter than 10th magnitude in June, C/2021 E3 (ZTF0 but only observable from the southern hemisphere, and C/2017 K2 (PANSTARRS) which is visible to all. In the magnitude 10 to 13 range are no less than 9 comets, 19P/Borrelly, 22P/Kopff, 169P/NEAT, C/2019 L3 (ATLAS), C/2019 T4 (ATLAS), C/2020 V2 (ZTF), C/2021 E3 (ZTF). C/2021 F1 (Lemmon-PANSTARRS), and C/2021 P4 (PANSTARRS).

In May the ALPO Comets Section received 76 magnitude estimates and 69 images/sketches of comets C/2021 P4 (ATLAS), C/2021 O3 (PANSTARRS), C/2021 E3 (ZTF), C/2021 A1 (Leonard), C/2020 Y2 (ATLAS), C/2020 V2 (ZTF), C/2020 R7 (ATLAS), C/2020 M5 (ATLAS), C/2020 K1 (PANSTARRS), C/2019 U5 (PANSTARRS), C/2019 T4 (ATLAS), C/2019 L3 (ATLAS), C/2017 K2 (PANSTARRS), 274P/Tombaugh-Tenagra, 272P/NEAT, 254P/McNaught, 244P/Scotti, 117P/Helin-Roman-Alu, 116P/Wild, 104P/Kowal, 73P/Schwassmann-Wachmann, 67P/Churyumov-Gerasimenko, 45P/Honda-Mrkos-Pajdusakova, 22P/Kopff, 19P/Borrelly, and 9P/Tempel. A hearty thanks to our April contributors: Dan Bartlett, Michel Deconinck, J. J. Gonzalez, Christian Harder, Michael Jager, Martin Mobberley, Mike Olason, Uwe Pilz, Raymond Ramlow, Tenho Tuomi, and Chris Wyatt.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

May 2, 2022 – ALPO Comet News for May 2022

Summary

Last month’s big question was “What’s up with C/2021 O3 (PANSTARRS)?” Would it survive passing 0.29 au from the Sun or disintegrate like many other dynamically new, intrinsically faint comets? We now have our answer. C/2021 O3 has likely disintegrated with a remnant dust cloud being all that’s remains of the comet. Still as of the end of April, some ground-based observers have been able to detect a diffuse remnant at ~9th magnitude. This at least gives us some hope of being able to monitor the slow dispersal of the dusty remains as it heads into the northern circumpolar evening sky.

Of course, C/2021 O3 isn’t the only comet in the sky. While May won’t see any very bright comets, a number will be in the 9-10th magnitude range including C/2017 K2 (PANSTARRS), C/2019 L3 (ATLAS), C/2021 E3 (ZTF), and C/2021 F1 (Lemmon-PANSTARRS) (the last two only visible from the southern hemisphere). Observers who can push fainter to around 12th magnitude can also observe 9P/Tempel, 19P/Borrelly, 22P/Kopff, 45P/Honda-Mrkos-Pajdusáková, C/2019 T4 (ATLAS), C/2020 (ZTF), and C/2021 P4 (ATLAS).

April saw the ALPO Comets Section receive 89 magnitude estimates and 15 images/sketches of comets C/2021 P4 (ATLAS), C/2021 O3 (PANSTARRS), C/2021 E3 (ZTF), C/2021 A1 (Leonard), C/2020 Y2 (ATLAS), C/2020 V2 (ZTF), C/2020 M5 (ATLAS), C/2020 K1 (PANSTARRS), C/2020 J1 (SONEAR), C/2019 T4 (ATLAS), C/2019 L3 (ATLAS), C/2017 K2 (PANSTARRS), 116P/Wild, 104P/Kowal, 73P/Schwassmann-Wachmann, 67P/Churyumov-Gerasimenko, 29P/Schwassmann-Wachmann, 22P/Kopff, 19P/Borrelly, and 9P/Tempel. A hearty thanks to our April contributors: Dan Bartlett, Michel Deconinck, J. J. Gonzalez, Christian Harder, Michael Jager, Mike Olason, Uwe Pilz, Raymond Ramlow, Chris Schur, and Chris Wyatt.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

April 3, 2022 – ALPO Comet News for April 2022

Summary

The big comet question for this month is what’s up with C/2021 O3 (PANSTARRS)? Arriving at perihelion on April 21 at a small heliocentric distance of 0.29 au, some predictions have PANSTARRS peaking at 4-5th magnitude. Unfortunately, the comet has a lot working against it. It is intrinsically faint, likely making its first passage through the inner Solar System, and when last observed back in early February was brightening at a very slow rate. All of these point to a comet that may be prone to disintegration as it nears perihelion, if it hasn’t already. Since the comet has been located a small solar elongation over the past 2 months, we don’t really know how bright it currently is. And to make things worse, it will either be unobservable or only observable deep in twilight in April.

Don’t worry if C/2021 O3 disappoints as there are plenty of other comets observable between 9th and 13th magnitude this month. C/2019 L3 (ATLAS) is at 9th magnitude and well placed in the evening sky. C/2017 K2 (PANSTARRS) continues to slowly brighten and may break the magnitude 10 level in the morning sky. Last month’s brightest comet, C/2021 F1 (Lemmon-PANSTARRS), will still be around 8th magnitude but will be too close to the Sun for most observers. Unfortunately, another 9th magnitude comet, 45P/Honda-Mrkos-Pajdusáková, will also be too close to the Sun for observation in April.

On the fainter side (between magnitude 10 and 13) we have short-period comets 9P/Tempel, 19P/Borrelly, 22P/Kopff, 29P/Schwassmann-Wachmann, 67P/Churyumov-Gerasimenko, 104P/Kowal, C/2019 T4 (ATLAS), C/2020 (ZTF), C/2021 E3 (ZTF), and C/2021 P4 (ATLAS). A few months ago, C/2021 A1 (Leonard) was dazzling comet watchers. The comet may be in the midst of its own disintegration or in the process of “turning off”. Imagers are encouraged to watch as the dusty remnant of Leonard slowly disperses.

Looking ahead to next year, recently discovered C/2022 E3 (ZTF) is currently 16th magnitude but may brighten to 5-6th magnitude next January and February.

Since the last Report was published on February 23, the ALPO Comets Section has received 161 magnitude estimates and 48 images and sketches of comets C/2021 P4 (ATLAS), C/2021 F1 (Lemmon-PANSTARRS), C/2021 E3 (ZTF), C/2020 Y2 (ATLAS), C/2020 V2 (ZTF), C/2020 U5 (PANSTARRS), C/2020 M5 (ATLAS), C/2020 J1 (SONEAR), C/2019 T4 (ATLAS), C/2019 L3 (ATLAS), C/2017 K2 (PANSTARRS), 116P/Wild, 108P/Ciffreo, 104P/Kowal, 67P/Churyumov-Gerasimenko, 29P/Schwassmann-Wachmann, 22P/Kopff, 19P/Borrelly, and 9P/Tempel. Observations were contributed by Dan Bartlett, Michel Deconinck, Stephane Ferier, J. J. Gonzalez, Christian Harder, Eliot Herman, Martin Mobberley, Uwe Pilz, Raymond Ramlow, Tenho Tuomi, and Chris Wyatt.

The monthly ALPO Comet News PDF can be found here. A shorter version of this report is posted on a dedicated Cloudy Nights forum. All are encouraged to join the discussion over at Cloudy Nights.

Older Posts »