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Observer's Information
Your Name
ICQ Observer ID
At least one of these fields above must be completed
UserEmail
Observation
Comet Name
-- Select --
2I/2019 Q4 (Borisov)
P/2021 Q5 (ATLAS)
C/2021 P4 (ATLAS)
C/2021 O3 (PANSTARRS)
C/2021 O1 (Nishimura)
P/2021 N2 (Fuls)
P/2021 N1 (ZTF)
P/2021 L2 (Leonard)
C/2021 K1 (MASTER)
C/2021 F1 (Lemmon-PANSTARRS)
C/2021 E3 (ZTF)
C/2021 D1 (SWAN)
C/2021 A7 (NEOWISE)
C/2021 A4 (NEOWISE)
C/2021 A2 (NEOWISE)
C/2021 A1 (Leonard)
C/2020 Y2 (ATLAS)
C/2020 V2 (ZTF)
C/2020 U5 (PANSTARRS)
C/2020 T2 (Palomar)
C/2020 S3 (Erasmus)
C/2020 R4 (ATLAS)
C/2020 Q1 (Borisov)
C/2020 PV6 (PANSTARRS)
C/2020 P1 (NEOWISE)
C/2020 O2 (Amaral)
C/2020 M5 (ATLAS)
C/2020 M3 (ATLAS)
C/2020 K8 (Catalina-ATLAS)
C/2020 K6 (Rankin)
C/2020 K1 (PANSTARRS)
C/2020 J1 (SONEAR)
C/2020 H5 (Robinson)
C/2020 H2 (Pruyne)
C/2020 G1 (Pimentel)
C/2020 F8 (SWAN)
C/2020 F5 (MASTER)
C/2020 F3 (NEOWISE)
C/2020 F2 (ATLAS)
C/2020 A2 (Iwamoto)
C/2019 Y4 (ATLAS)
C/2019 Y1 (ATLAS)
C/2019 U6 (Lemmon)
C/2019 U5 (PANSTARRS)
C/2019 T4 (ATLAS)
C/2019 T3 (ATLAS)
C/2019 N1 (ATLAS)
C/2019 LD2 (ATLAS)
C/2019 L3 (ATLAS)
C/2019 K7 (Smith)
C/2019 K5 (Young)
C/2019 F1 (ATLAS-Africano)
C/2019 D1 (Flewelling)
C/2019 A9 (PANSTARRS)
C/2018 Y1 (Iwamoto)
C/2018 W2 (Africano)
C/2018 W1 (Catalina)
A/2018 V3
C/2018 V1 (Machholz-Fujikawa-Iwamoto)
C/2018 U1 (Lemmon)
C/2018 R3 (Lemmon)
C/2018 N2 (ASASSN)
C/2018 N1 (NEOWISE)
C/2018 L2 (ATLAS)
C/2018 F4 (PANSTARRS)
C/2018 EF9 (Lemmon)
C/2018 A6 (Gibbs)
C/2017 Y2 (PANSTARRS)
C/2017 U7 (PANSTARRS)
C/2017 T3 (ATLAS)
C/2017 T2 (PANSTARRS)
C/2017 T1 (Heinze)
C/2017 S3 (PANSTARRS)
C/2017 O1 (ASASSN)
C/2017 M4 (ATLAS)
C/2017 K2 (PANSTARRS)
C/2017 E4 (Lovejoy)
C/2017 E1 (Borisov)
C/2017 D2 (Barros)
C/2017 B3 (LINEAR)
C/2016 VZ18 (PANSTARRS)
C/2016 U1 (NEOWISE)
C/2016 R2 (PANSTARRS)
C/2016 N6 (PANSTARRS)
C/2016 N4 (MASTER)
C/2016 M1 (PANSTARRS)
C/2016 A8 (LINEAR)
C/2015 VL62 (Lemmon-Yeung-PANSTARRS)
C/2015 V2 (Johnson)
C/2015 V1 (PANSTARRS)
C/2015 TQ209 (LINEAR)
C/2015 O1 (PANSTARRS)
C/2015 G2 (MASTER)
C/2015 F5 (SWAN-Xingming)
C/2015 F3 (SWAN)
C/2015 F2 (Polonia)
C/2015 ER61 (PANSTARRS)
C/2015 D1 (SOHO)
C/2015 C2 (SWAN)
C/2014 W2 (PANSTARRS)
C/2014 S2 (PANSTARRS)
C/2014 R1 (Borisov)
C/2014 Q3 (Borisov)
C/2014 Q2 (Lovejoy)
C/2014 Q1 (PANSTARRS)
C/2014 E2 (Jacques)
C/2014 B1 (Schwartz)
C/2013 X1 (PANSTARRS)
C/2013 V5 (Oukaimeden)
C/2013 V3 (Nevski)
C/2013 US10 (Catalina)
C/2013 UQ4 (Catalina)
C/2013 R1 (Lovejoy)
C/2013 N4 (Borisov)
P/2013 J2 (McNaught)
C/2013 A1 (Siding Spring)
C/2012 X1 (LINEAR)
C/2012 V2 (LINEAR)
C/2012 T5 (Bressi)
C/2012 S1 (ISON)
P/2012 NJ (La Sagra)
C/2012 L2 (LINEAR)
C/2012 L1 (LINEAR)
C/2012 K5 (LINEAR)
C/2012 K1 (PANSTARRS)
C/2012 J1 (Catalina)
C/2012 F6 (Lemmon)
C/2012 CH17 (MOSS)
C/2012 C2 (Bruenjes)
P/2012 B1 (PANSTARRS)
C/2012 A2 (LINEAR)
C/2011 W3 (Lovejoy)
C/2011 UF305 (LINEAR)
C/2011 S2 (Kowalski)
C/2011 Q4 (SWAN)
C/2011 R1 (McNaught)
C/2011 M1 (LINEAR)
C/2011 L4 (PANSTARRS)
C/2011 L3 (McNaught)
C/2011 KP36 (Spacewatch)
C/2011 J2 (LINEAR)
C/2011 F1 (LINEAR)
C/2011 C1 (McNaught)
C/2011 A3 (Gibbs)
C/2010 X1 (LINEAR)
C/2010 S1 (LINEAR)
P/2010 JC81 (WISE)
C/2010 J1 (Boattini)
P/2010 H2 (Vales)
C/2010 G2 (Hill)
C/2010 G1 (Boattini)
C/2010 F4 (Machholz)
C/2010 B1 (Cardinal)
P/2010 A5 (LINEAR)
C/2009 Y1 (Catalina)
C/2009 U3 (Hill)
P/2009 T2 (La Sagra)
C/2009 R1 (McNaught)
P/2009 Q5 (McNaught)
C/2009 P1 (Garradd)
C/2009 O4 (Hill)
C/2009 O2 (Catalina)
C/2009 K5 (McNaught)
C/2009 K4 (Gibbs)
C/2009 G1 (STEREO)
C/2009 F6 (Yi-SWAN)
C/2009 F4 (McNaught)
C/2009 E1 (Itagaki)
C/2008 T2 (Cardinal)
C/2008 Q3 (Garradd)
C/2008 P1 (Garradd)
P/2008 L2 (Hill)
C/2008 J4 (McNaught)
C/2008 J1 (Boattini)
C/2008 FK75 (Lemmon-Siding Spring)
C/2008 C1 (Chen-Gao)
C/2008 A1 (McNaught)
C/2007 W1 (Boattini)
C/2007 U1 (LINEAR)
C/2007 T1 (McNaught)
C/2007 Q3 (Siding Spring)
C/2007 N3 (Lulin)
C/2007 G1 (LINEAR)
C/2007 F1 (LONEOS)
C/2007 B2 (Skiff)
C/2006 XA1 (LINEAR)
C/2006 WD4 (Lemmon)
C/2006 W3 (Christensen)
C/2006 VZ13 (LINEAR)
C/2006 U6 (Spacewatch)
C/2006 S3 (LONEOS)
C/2006 Q1 (McNaught)
C/2006 P1 (McNaught)
C/2006 OF2 (Broughton)
C/2006 M4 (SWAN)
C/2006 L2 (McNaught)
C/2006 L1 (Garradd)
P/2006 HR30 (Siding Spring)
C/2006 A1 (Pojmanski)
P/2005 T4 (SWAN)
C/2005 P3 (SWAN)
C/2005 N1 (Juels-Holvorcem)
C/2005 L3 (McNaught)
C/2005 K2 (LINEAR)
C/2005 A1 (LINEAR)
C/2004 V13 (SWAN)
C/2004 Q2 (Machholz)
C/2004 Q1 (Tucker)
C/2004 H6 (SWAN)
C/2004 F4 (Bradfield)
C/2004 B1 (LINEAR)
C/2003 WT42 (LINEAR)
C/2003 T4 (LINEAR)
C/2003 T3 (Tabur)
C/2003 K4 (LINEAR)
C/2003 H1 (LINEAR)
C/2002 Y1 (Juels-Holvercem)
C/2002 X5 (Kudo-Fujikawa)
C/2002 V1 (NEAT)
C/2002 T7 (LINEAR)
C/2002 O7 (LINEAR)
C/2002 O6 (SWAN)
C/2002 O4 (Hoenig)
C/2002 F1 (Utsonomiya)
C/2001 RX14 (LINEAR)
C/2001 Q4 (NEAT)
C/2001 HT50 (LINEAR-NEAT)
C/2001 A2 (LINEAR)
C/2000 WM1 (LINEAR)
C/1999 T1 (McNaught-Hartley)
C/1999 S4 (LINEAR)
C/1999 N2 (Lynn)
C/1999 J3 (LINEAR)
C/1999 H1 (Lee)
C/1998 U5 (LINEAR)
C/1998 T1 (LINEAR)
C/1998 P1 (Williams)
C/1998 M5 (LINEAR)
C/1997 T1 (Utsunomiya)
C/1997 BA6 (Spacewatch)
C/1996 Q1 (Tabur)
C/1996 N1 (Brewington)
C/1996 E1 (NEAT)
C/1996 B2 (Hyakutake)
C/1996 B1 (Szczepanski)
C/1995 Y1 (Hyakutake)
C/1995 Q1 (Bradfield)
C/1995 O1 (Hale-Bopp)
C/1994 N1 (Nakamura-Nishimura-Machholz)
C/1994 J2 (Takamizawa)
C/1994 G1 (Takamizawa-Levy)
C/1993 Y1 (McNaught-Russell)
C/1993 Q1 (Mueller)
C/1993 A1 (Mueller)
C/1992 F1 (Tanaka-Machholz)
C/1991 Y1 (Zanotta-Brewington)
C/1991 X2 (Mueller)
C/1991 T2 (Shoemaker-Levy)
C/1991 L3 (Levy)
C/1991 A2 (Arai)
C/1990 T1 (Tsuchiya-Kiuchi)
C/1990 K1 (Levy)
C/1990 E1 (Cernis-Kiuchi-Nakamura)
C/1989 Y1 (Skorichenko-George)
C/1989 X1 (Austin)
C/1989 W1 (Aarseth-Brewington)
C/1989 T1 (Helin-Roman-Alu)
C/1989 Q1 (Okazaki-Levy-Rudenko)
C/1989 A1 (Yanaka)
C/1988 A1 (Liller)
C/1987 W1 (Ichimura)
C/1987 P1 (Bradfield)
C/1987 B2 (Terasako)
C/1986 P1 (Wilson)
C/1984 A1 (Bradfield)
C/1983 J1 (Sugano-Saigusa-Fujikawa)
C/1983 H1 (IRAS-Araki-Alcock)
C/1982 M1 (Austin)
C/1980 Y1 (Bradfield)
C/1979 Y1 (Bradfield)
C/1978 H1 (Meier)
C/1977 R1 (Kohler)
C/1975 V1 (West)
C/1975 T2 (Suzuki-Saigusa-Mori)
C/1975 T1 (Mori-Sato-Fujikawa)
C/1975 N1 (Kobayashi-Berger-Milon)
C/1974 C1 (Bradfield)
C/1973 E1 (Kohoutek)
C/1970 U1 (Suzuki-Sato-Seki)
C/1970 N1 (Abe)
C/1969 T1 (Tago-Sato-Kosaka)
C/1968 Y1 (Thomas)
C/1968 Q2 (Honda)
C/1968 Q1 (Bally-Clayton)
C/1968 N1 (Honda)
C/1968 L1 (Whitaker-Thomas)
C/1968 H1 (Tago-Honda-Yamamoto)
C/1967 Y1 (Ikeya-Seki)
C/1967 C2 (Wild)
C/1967 C1 (Seki)
C/1966 T1 (Rudnicki)
C/1966 R1 (Ikeya-Everhart)
C/1966 P2 (Barbon)
C/1966 P1 (Kilston)
C/1965 S1 (Ikeya-Seki)
C/1964 T1 (Tomita-Gerber-Honda)
C/1964 P1 (Everhart)
C/1964 N1 (Ikeya)
C/1963 R1 (Pereyra)
C/1963 F1 (Alcock)
C/1963 A1 (Ikeya)
C/1962 C1 (Seki-Lines)
C/1961 R1 (Humason)
C/1960 O1 (Wilson-Hubbard)
C/1960 Y1 (Candy)
C/1959 Y1 (Burnham)
C/1959 Q2 (Alcock)
C/1959 Q1 (Alcock)
C/1958 D1 (Burnham)
C/1956 R1 (Arend-Roland)
C/1956 E1 (Mrkos)
C/1955 L1 (Mrkos)
433P/(248370) 2005 QN173
429P/LINEAR-Hill
424P/La Sagra
418P/LINEAR
414P/STEREO
402P/LINEAR
398P/Boattini
395P/Catalina-NEAT
378P/378P/McNaught
364P/PANSTARRS
355P/LINEAR-NEAT
332P/Ikeya-Murakami
325P/Yang-Gao
315P/LONEOS
304P/Ory
300P/Catalina
297P/Beshore
290P/Jager
289P/Blanpain
284P/McNaught
274P/Tombaugh-Tenagra
273P/Pons-Gambart
266P/Christensen
262P/McNaught-Russell
260P/McNaught
252P/LINEAR
249P/LINEAR
246P/NEAT
241P/LINEAR
240P/NEAT
237P/LINEAR
230P/LINEAR
217P/LINEAR
213P/Van Ness
210P/Christensen
209P/LINEAR
193P/LINEAR-NEAT
185P/Petriew
179P/Jedicke
177P/Barnard
175P/Hergenrother
174P/Echeclus
169P/NEAT
168P/Hergenrother
162P/Siding Spring
158P/Kowal-LINEAR
156P/Russell-LINEAR
155P/Shoemaker
154P/Brewington
153P/Ikeya-Zhang
144P/Kushida
141P/Machholz
132P/Helin-Roman-Alu
123P/West-Hartley
122P/de Vico
119P/Parker-Hartley
117P/Helin-Roman-Alu
116P/Wild
114P/Wiseman-Skiff
113P/Spitaler
110P/Hartley
109P/Swift-Tuttle
108P/Ciffreo
106P/Schuster
104P/Kowal
103P/Hartley
102P/Shoemaker
97P/Metcalf-Brewington
96P/Machholz
94P/Russell
93P/Lovas
88P/Howell
87P/Bus
86P/Wild
84P/Giclas
81P/Wild
78P/Gehrels
77P/Longmore
74P/Smirnova-Cherynkh
73P-bt/Schwassmann-Wachmann
73P-C/Schwassmann-Wachmann
73P-C/Schwassmann-Wachmann
73P-B/Schwassmann-Wachmann
71P/Clark
70P/Kojima
68P/Klemola
67P/Churyumov-Gerasimenko
66P/du Toit
65P/Gunn
64P/Swift-Gehrels
63P/Wild 1
62P/Tsuchinshan
61P/Shajn-Schaldach
60P/Tsuchinshan
58P/Jackson-Neujmin
57P/du Toit-Neujmin-Delporte
55P/Tempel-Tuttle
53P/Van Biesbroeck
50P/Arend
49P/Arend-Rigaux
48P/Johnson
47P/Ashbrook-Jackson
46P/Wirtanen
45P/Honda-Mrkos-Padjasakova
44P/Reinmuth
43P/Wolf-Harrington
41P/Tuttle-Giacobini-Kresak
38P/Stephan-Oterma
37P/Forbes
36P/Whipple
32P/Comas-Sola
31P/Schwassmann-Wachmann
29P/Schwassmann-Wachmann
28P/Neujmin
26P/Grigg-Skjellerup
24P/Schaumasse
23P/Brorsen-Metcalf
22P/Kopff
21P/Giacobini-Zinner
19P/Borrelly
17P/Holmes
15P/Finlay
13P/Olbers
11P/Tempel-Swift-LINEAR
C/2022 L2 (ATLAS)
9P/Tempel
8P/Tuttle
7P/Pons-Winnecke
6P/d'Arrest
4P/Faye
2P/Encke
1P/Halley
C/2020 R4 (ATLAS)
C/2022 E3 (ZTF)
C/2019 T3 (ATLAS)
C/2019 O3
A/2019 O3
C/2021 B3 (NEOWISE)
28P/Neujmin
C/2020 N1 (PANSTARRS)
C/2021 A10 (NEOWISE)
C/2020 F5 (MASTER)
C/2021 A4 (NEOWISE)
191P/McNaught
C/2020 S8 (Lemmon)
A/2018 W3
C/2021 R7 (PANSTARRS)
C/2020 J1 (SONEAR)
16P/Brooks
C/2020 P3 (ATLAS)
P/2015 J3 (NEOWISE)
A/2019 T2
C/2019 T2
C/2021 A6 (PANSTARRS)
C/2021 K1 (ATLAS)
C/2021 B2 (PANSTARRS)
324P/La Sagra
120P/Mueller
C/2016 Q2 (PANSTARRS)
142P/Ge-Wang
433P/NEAT
428P/Gibbs
P/2013 O2 (PANSTARRS)
399P/PANSTARRS
P/2021 R3 (PANSTARRS)
7P/Pons-Winnecke
C/2014 F3 (Sheppard-Trujillo)
P/2021 P3 (PANSTARRS)
C/2020 K5 (PANSTARRS)
P/2021 PE20 (ATLAS)
P/2016 BA14 (PANSTARRS)
111P/Helin-Roman-Crockett
P/2014 W12 (Gibbs)
C/2019 F1 (ATLAS-Africano)
410P/NEAT-LINEAR
P/2020 WJ5 (Lemmon)
C/2020 T4 (PANSTARRS)
C/2020 T2 (Palomar)
15P/Finlay
C/2021 A7 (NEOWISE)
413P/Larson
P/2020 V4 (Rankin)
P/2014 E1 (Larson)
C/2021 G1 (Leonard)
P/2021 L2 (Leonard)
241P/LINEAR
P/2021 T3 (PANSTARRS)
P/2021 HS (PANSTARRS)
C/2021 O1 (Nishimura)
106P/Schuster
C/2020 M5 (ATLAS)
193P/LINEAR-NEAT
439P/LINEAR
C/2020 O2 (Amaral)
8P/Tuttle
P/2022 D1 (PANSTARRS)
P/2021 Q5 (ATLAS)
283P/Spacewatch
4P/Faye
C/2021 K2 (MASTER)
108P/Ciffreo
284P/McNaught
P/2007 H1 (McNaught)
C/2020 K6 (Rankin)
6P/d'Arrest
P/2004 R3 (LINEAR-NEAT)
425P/Kowalski
C/2021 J2 (PANSTARRS)
423P/Lemmon
C/2020 PV6 (PANSTARRS)
C/2020 H6 (ATLAS)
P/2021 U1 (Wierzchos)
461P/WISE
P/2010 OE101 (WISE)
A/2010 OE101 (WISE)
52P/Harrington-Abell
P/2021 R4 (Wierzchos)
C/2021 T1 (Lemmon)
418P/LINEAR
57P/du Toit-Neujmin-Delporte
C/2021 G3 (PANSTARRS)
110P/Hartley
282P
P/2021 U3 (Attard-Maury)
P/2012 TK8 (Tenagra)
434P/Tenagra
419P/PANSTARRS
P/2015 F1 (PANSTARRS)
424P/La Sagra
P/2012 S2 (La Sagra)
P/2021 R6 (Groeller)
67P/Churyumov-Gerasimenko
C/2018 U1 (Lemmon)
Observation Date & Time (UT)
Equipment
Instrument type
-- Select --
Camera lens
Binoculars
Cassegrain reflector
Schmidt reflector
Naked eye
Twin catadioptric Newtonian binocular
Coronagraph
Hyperboloid astro-camera
Multiple-Mirror Telescope
Jones-Bird telescope
Klevtsov-Cassegrain
Newtonian
Maksutov
Monocular 1x
Opera glass
Prime focus of a reflector
small telescopes with aperture in range 4-10 inches
Observations with the largest telescopes
small telescopes and finders with aperture not exceeding 4 inches
Refractor
Schmidt-Newtonian
Schmidt-Cassegrain
Coude focus of a reflector
Volosov-Newtonian
Wright-Schmidt
Ritchey-Chretien
Instrument's Aperture in cm
Instrument's Focal Ratio (rounded to the nearest integer)
Magnification
(for a visual estimate)
CCD exposure (secs)
(for a photographic estimate)
Either magnification or exposure should be supplied (not both)
Magnitude Estimate
Estimated Magnitude
Check here if comet not seen (i.e., fainter than magnitude entered)
Check if magnitude estimate is not very accurate, or made under poor conditions
Magnitude Estimation Method
-- Select --
[-] Unknown
[a] Orange filter used on SOHO spacecraft with C2 and C3 coronagraphs
[A] Pogson
[b] VBM method using RCA #4549 image intensifier
[B] Simple Out-Out method
[c] Unfiltered nuclear CCD magnitude
[C] Unfiltered total CCD magnitude
[d] Astrodon G filter
[D] Johnson/Bessel/Kron/Cousins B with CCD
[e] Extrafocal-Extinction (or Beyer) method using RCA #4549 image intensifier
[E] Extrafocal-Extinction method
[f] 'Nuclear' magnitude obtained using Meade CCD interference filter CM-500 Visible
[F] Total magnitude obtained using Meade CCD interference filter CM-500 Visible
[g] CCD magnitude with Gunn g filter
[G] CCD magnitude with a Corion NR-400 'minus-infrared' filter
[H] Kron/Cousins I with CCD
[i] Visual observation using an image intensifier
[I] In-focus
[j] Kron-Cousins V filter employed (m2 estimate)
[J] Kron-Cousins V filter employed
[k] Kron/Cousins R with CCD
[K] Clear filter used on SOHO spacecraft with C3 coronagraph
[l] CCD magnitude with a Wratten 25 filter
[L] Photoelectric B
[M] Modified-Out method
[N] Called magnitude of nucleus or condensation
[o] Visual extrafocal comparison using RCA #4549 image intensifier
[O] Out-of-focus (or extrafocal) method
[p] Photographic with Kodak 2415 film
[P] photographic
[q] R-band magnitude for nuclear condensation
[Q] 'out-out'; supposed to be same as VBB method"
[r] CCD magnitude with Gunn r filter
[R] Photoelectric R
[s] VSS method using image intensifier
[S] In-Out method
[t] Total visual magnitude (no other information provided; historical obs. only)
[T] Magnitude estimated from a TV monitor
[u] CCD-derived V nuclear magnitudes (m2)
[U] Johnson/Bessel/Kron/Cousins U with CCD
[v] Photoelectric with filters to match visual
[V] Johnson/Bessel/Kron/Cousins V with CCD
[w] 1P21 photometer + Kodak W64 filter
[W] Photoelectric (no band given)
[X] Ortochromatic film + yellow filter (a system very close to the V band)
[Y] Wratten No. 15 with CCD
[Z] CCD Visual equivalent
Reference or source of comparison stars used for making the magnitude estimate
-- Select --
[AE] Planetary magnitudes from the American Ephemeris and Nautical Almanac
[AQ] APASS Unspecified passband
[AT] Arizona-Tonantzintla Catalog
[AU] ASAS-3 V magnitudes
[BR] V magnitude sequence for stars in the Coma cluster of galaxies including Abell 1656
[BS] Johnson V photometry by Brian Skiff at Lowell Observatory
[C] Photovisual magnitudes from "Cape Photographic Catalogue for 1950.0"""
[CA] M44 standard sequence as published in Henden and Kaitchuck's Astronomical Photometry
[CD] Open star cluster NGC 225 (R.A. = 0h43m.8, Decl. = +61 47', equinox 2000.0) photometry
[CE] Open star cluster NGC 1647 photometry
[CF] Open star cluster NGC 2129 photometry
[CG] Open star cluster NGC 2422 (M47) photometry
[CH] Open star cluster NGC 6494 (M23) photometry
[CI] Open star cluster NGC 6823 photometry
[CJ] Open star cluster NGC 6910 photometry
[CK] Open star cluster NGC 7031 photometry
[CL] Photometry by Hoag et al. (1961) from one of the open-star-cluster charts as published in Visual Astronomy of the Deep Sky
[CM] Photovisual and photoelectric-V magnitudes from Cape Mimeograms
[CN] Open star cluster NGC 7235 photometry
[CO] UBV photometry for 39 stars in the range 11.7 < V < 18.7, from "A New Stellar Standard Sequence in the Comet Cluster of Galaxies"""
[CR] V magnitudes of 13 stars surrounding NGC 3627 (M66), as given by Ciatti and Rosino
[CS] Catalogue of Stellar Identifications (1979, Strasbourg)
[D] Dutch Comet Halley Handbook
[E] One of Everhart's 3 Selected Area charts
[EA] Selected Area 51: From Everhart
[EB] Selected Area 57: From Everhart
[EC] Selected Area 68: From Everhart
[FA] V photometry by Harold Ables, U.S. Naval Observatory, Flagstaff
[GA] Guide Star Photometric Catalog - I
[GP] Same as 'HE'; see below
[HD] Henry Draper Catalog
[HE] Harvard E Regions (declination -45 deg)
[HI] Hipparcos Input Catalogue
[HJ] Magnitudes in the Hipparcos photometric system
[HK] H_p magnitudes from the Hipparcos Catalogue
[HN] Arne Henden's photometric sequences
[HP] Harvard Photometry
[HR] Harvard Revised Photometry
[HV] Johnson V magnitudes from Hipparcos Catalogue
[JH] Jet Propulsion Laboratory's Horizons website
[JT] Cousins VRI magnitudes of stars in M67
[L] Landolt V Photoelectric Sequences
[LA] Landolt photoelectric sequences
[LB] Landolt (1983, AJ 88, 439 and 853) sequences as published by Christian Buil
[LC] Landolt (1975, PASP 87, 379) magnitude sequence for 33 stars near V1057 Cyg
[MC] Carlsberg Meridian Catalogue (1989). Volume 4. La Palma.
[ME] V photometry by Tedesco, Tholen, and Zellner
[MK] V magnitudes for M67 in LE GUIDE PRATIQUE DE L'ASTRONOMIE CCD
[MP] McCormick Photovisual Sequence (Univ. of Virginia)
[MS] From "McCormick Photovisual Sequences""
[MT] Visual magnitudes of stars in M67 as published by B. E. Schaefer
[MV] From Publ. Leander McCormick Obs., Vol. VI, Part II, pp. 201-306
[NH] North Polar Sequence as published by Henden and Kaitchuck
[NN] NGC 2129/6531/1342 cluster photometry
[NO] U.S.N.O. Photoelectric Photometry Catalogue
[NP] North Polar Sequence (publ. by the A.A.V.S.O.)
[NS] "Magnitudes and Colors of Stars North of +80""
[OB] Magnitudes for faint cluster stars from S. C. Odewahn, C. Bryja, and R. M. Humphreys (1992)
[PA] M45 sequence, Johnson & Mitchell
[PB] Pleiades chart in Sky and Telescope 70, 465 (1985)
[PC] Pleiades sequence, Henden and Kaitchuck
[PI] IC 4665 sequence as found in Henden and Kaitchuck
[RB] "Photoelectric Magnitudes and Colours of Southern Stars"""
[RC] "Standard Magnitudes in the E Regions""
[SD] V magnitudes of members of the globular cluster M15 in the range 13 < V < 22
[SE] V magnitudes of 134 stars of the II Persei Association
[SK] Brian Skiff's compilation of magnitudes as part of the LONEOS project (Lowell Observatory)
[SM] V magnitudes from "A Visual Atlas of the Small Magellanic Cloud"""
[SP] Skalnate-Pleso Atlas Catalog (Atlas Coeli Cat.)
[SS] Various regions covering declination -60 deg to +10 deg
[SW] Four half-degree fields with finder charts and UBV photometry
[TA] Comparison-star magnitudes from "The Amateur Sky Survey"" (TASS)"
[TG] CCD magnitudes on the Thuan-Gunn system
[TI] Tycho Input Catalogue
[TJ] Tycho Catalogue Johnson V magnitudes
[TK] Tycho-2 Catalogue
[TS] Field of 13 stars
[TT] Tycho/Hipparcos Catalogue V_T magnitudes
[VG] Japanese variable-star charts edited by K. Gomi
[Y] Yale Bright Star Catalogue
[YF] Yale Bright Star Catalogue, fourth edition
[YG] Yale Bright Star Catalogue, fifth edition
[AA] A.A.V.S.O. Variable Star Atlas
[AC] Charts of the Amer. Assn. of Var. Star Observers
[AP] Atlas Photometrique des Constellations
[AS] AAVSO chart for M81 (NGC 3031) in Ursa Major
[FD] R magnitudes of M13 stars as published in "A photoelectric BVRI sequence in the field of the globular cluster NGC 6205 (M13)"""
[FG] From variable star charts published in *A Field Guide to the Stars and Planets*
[LD] Lietuvos Dangus 2007
[LM] V magnitudes from "A Visual Atlas of the Large Magellanic Cloud"""
[ML] V magnitudes on chart of Large Magellanic Cloud
[MM] V magnitudes on chart of Small Magellanic Cloud
[OH] From listing of bright stars in Observers' Handbook, R.A.S.C.
[PK] From the Soviet Program for Comet Halley
[S] Smithsonian Astrophysical Obs. Star Catalog
[SA] M67 sequence by R. E. Schild
[SC] Sky Catalogue 2000.0
[VB] Variable star charts of the British Astr. Assn.
[VF] Variable star charts of the A.F.O.E.V. (France)
[VN] Variable star charts of the R.A.S. of New Zealand
[W] International Halley Watch (IHW)
[WA] Special IHW version of AAVSO chart for SU Tauri
[WB] Special IHW version of AAVSO chart for CZ Orionis
[WC] Special IHW version of AAVSO chart for Y Tauri
[WD] Special IHW version of AAVSO chart for V Tauri
[WE] IHW version of AAVSO chart for X Sextantis
[WF] IHW version of AAVSO chart for S Sextantis
[WG] IHW version of AAVSO chart for SX Leonis
[WH] Unspecified IHW charts
[WW] B.A.A. Charts as published in the IHW Observers' Manual
[BC] Boss Catalogue
[BD] Bonner Durchmusterung
[CC] Carte du Ciel
[GR] Groombridge
[HS] V magnitudes from Hubble Space Telescope.
[LN] Lampkin's Naked-Eye Stars
[PD] "Photometrische Durchmusterung: Generalkatalog"""
[PL] Star(s) & sources quoted for photoelectric data
[RA] Annual Ephemeris of the Royal Astronomical Society of Canada
[TB] Supernova Search Charts
[V] Variable star charts from recognized sources
[GK] Astronomisches Gesellschaft Katalog
[AH] G. D. Roth's Astronomy: A Handbook
[YZ] Yale Zone catalogue.
[A] Charts or Atlas of the AAVSO
[AN] Comparison-star sequences as published by M. Beyer
[AO] USNO (S)A1.0 catalogue R magnitudes
[UA] Atlases Borealis
[UC] Cape Photographic Catalogs
[UL] Specific comet or planet mentioned as magnitude reference
[UM] Magnitudes of galaxies, nebulae, etc.
[UN] Norton's Atlas
[UO] USNO A2.0 catalogue R magnitudes
[UP] Any standard photographic atlas
[UR] Revue des Constellations
[UU] UCAC2
[US] Skalnate Pleso Atlas
[UX] Specific stars quoted, no catalogue given
[U3] UCAC3
[U4] UCAC4
[-] Unknown
[GB] Guide Star Photometric Catalog - II
[GG] GAIA DR1, DR2, EDR3 G
[U5] UCAC5
[BG] GAIA DR1, DR2, EDR3 GBP
[RG] GAIA DR1, DR2, EDR3 GRP
[AB] APASS Johnson B
[AV] APASS Johnson V
[AR] APASS Sloan r
[AI] APASS Sloan i
[AZ] APASS Sloan z
[AG] APASS Sloan g
Coma Appearance
Coma diameter in arc-minutes
Coma characterization
-- Select --
faint disk within the coma
bright disk within the coma
faint stellar or nearly-stellar condensation
Degree of Coma Condensation
0 = completely diffuse, 9 = completely stellar
Tail Appearance
Check if comet had a tail
Measurement Units
-- Select --
Degree
Arc-Minute
Arc-Second
Tail length
Tail's Position Angle