Jupiter Section Blog
Jupiter Observing Alert
1/11/2025
NTB Outbreak
Clyde Foster's capture of the outbreak in methane light on January 10, 2025 at 18:56 UT
Clyde Foster and Manos Kardasis have just (Jan 10UT) imaged a bright spot in the NTBs jet region. This is likely the beginning of a major outbreak. John Rogers of the B.A.A. says, "We can expect it to become spectacular!"
It is brightest in the methane band, but should brighten in other wavelengths as it develops. It should create a a dark turbulent wake in the next few days.
Initial position is SYS 1 longitude of 168° with a drift of around -5° per day. (Note: the fast current travels at SYS 1 speed despite being at a latitude of around +26°.)
All observers are encouraged to monitor Jupiter as much as possible. There should be several more outbreaks at other longitudes in the coming days.
Send your images to jupiter@alpo-astronomy.org, following the Image Submission Guidelines so that your image will be searchable in the database.
Feel free to post your images to the ALPO Jupiter Section Groups.IO as well which can be found here.
Clear Skies,
Craig MacDougal
Assistant Coordinator
ALPO Jupiter Section

Jupiter 2024-25 Apparition Underway
8/27/2024

The 2024-2025 Jupiter apparition is well underway now, heading for western quadrature on September 12th when it will lie on the meridian at sunrise. Early morning observers have been submitting reports and excellent images, documenting the current belt and zone activity.

The Great Red Spot retains an orangish color and is down to about 13,100 km as measured in a recent fine image by ALPO member Gary Walker. With Earth’s equatorial diameter at 12,750 km, we have to wonder how much longer the most iconic storm in our solar system can claim to be larger than our home planet!

The South Equatorial Belt region trailing the GRS is fairly turbulent, with a large rift running SE-NW appearing the last couple of weeks. As noted by John Rogers and Shinji Mizumoto in their recent BAA report for the start of the apparition, there is an interesting South Equatorial Disturbance on the northern edge of the SEB, at about L1 = 280°. The North Equatorial Belt is back to being the widest, most dominant belt on the planet, making some of the long-enduring white spots (e.g., WS-E, WS-Z) more easily seen against the brown backdrop of the belt. There also have been some very intense “hot spots” along the southern border of the NEB, appearing as dark slate color.

Please continue to send in your images and sketches to jupiter@alpo-astronomy.org following the guidelines for submitting reports.


BAA Issues Report on EZ
1/30/2022

Dr. John Rogers at the British Astronomical Association has announced publication of their 7th report for the 2021-2022 apparition of Jupiter. This report highlight activity in Jupiter’s Equatorial region.

  •  Methane-bright patches in the EZ that are almost stationary in their CM III (L3) longitude
  • Bright plume outbreaks seen in the unusually quiet NEBs with two recent outbreaks happening December 19th and January 9th.

Don't Quit Yet!
1/28/2022

We are a little over a month from Jupiter’s solar conjunction (Mar 5, 2022), so it is getting harder to observe the giant planet. But if you are fortunate enough to have a clear western horizon, your observations can be very important before we lose the planet entirely the Sun’s glare. We have seen before a situation where Jupiter emerges as a morning object a few weeks later sporting significant changes since it left the evening sky. Even though your observation may lack steady seeing and fine detail that is more easily captured at opposition, recording the state of large-scale features can prove useful.


Juno Spies Clouds Above Anti-Cyclone Storm
12/29/2021

Don’t miss today's amazing image at APOD of one of the anti-cyclone white ovals captured by the Juno spacecraft during last month’s flyby of the giant planet. The photo resolves higher 50km clouds across the face of the oval as well as their shadow against the white oval cloud deck below.