Where and how to observe comet Tsuchinshan-ATLAS in Lyon? – Old Lyon papers

The comet C/2023 A3 (Tsuchinshan-ATLAS) is a celestial object that arouses great interest in the astronomy community. Discovered in January 2023 by the Purple Mountain Observatory (Tsuchinshan) in China and the ATLAS (Earth Asteroid Impact Late Warning System) program in Hawaii, this comet could offer a special sight in 2024 by visible to the naked eye from Earth.

The picture above was built on 10/13/2024 in the Massif inventory near Grenoble.

Scientific data on Comet Tsuchinshan-ATLAS

• Official assignment : C/2023 A3 (Tsuchinshan-ATLAS)
• Date of discovery : January 2023
• Finders : Purple Mountain Observatory and the ATLAS program
• Perihelion (closest passage to the Sun) : Planned for September 28, 2024
• Distance to perihelion : environment 0.39 astronomical units (AU) of the Sun (1 AU ≈ 150 million km)
• Way as close to Earth as possible : environment 0.46 AUplanned for October 13, 2024
• Expected apparent size : It could reach a size 0 to -1which would make it very clear and easy to see to the naked eye
• Origin : Possibly from the Oort Cloud, a distant region of the solar system full of long-period comets

When can you see a comet from Lyon?

The ideal time to watch the Tsuchinshan-ATLAS comet from Lyon will be between September and November 2024 :

• End of September to beginning of October 2024 : To be seen in the volatile sky, before sunrise, to the east.
• Mid-October to November 2024 : Visible in the evening sky, after sunset, looking west.

Trajectory in the air

• September 2024 : The comet will cross stars Lion you Sessional.
• October 2024 : He will move towards the constellations of the Maiden you Bouvier.
• November 2024 : It moves away quickly, diminishing in brightness.

Ways to find it

1. Use astronomy apps : Free applications like Stellarium, SkySafari or Star walk 2 allowing you to track the position of celestial objects in real time based on your location.
2. Talk to the ephemeris : The ephemeris provides detailed information about the position of the stars for each day. Sites likeIMCCE (Institute of Celestial Mechanics and Ephemeris Calculation) offers this data.
3. Look at specific constellations : Know the constellations that cross the comet to make it easier to see them.
4. Participate in observation sessions : Join local astronomy clubs that organize collective observations.

Where to see a comet in Lyon?

For best viewing, move away from areas with high light pollution. Here are some recommended sites around Lyon:

1. Mount Verdun : Located about 15 km northwest of Lyon, this highest point offers a clear horizon and less light pollution.
2. The Col de la Luère : About 20 km west of Lyon, this pass is accessible and far from urban lights.
3. Height of the Monts du Lyonnais : Towns like Eosaron or Saint-André-la-Côte offering dark skies.
4. Pilate’s Park : About 40 km south of Lyon, this regional natural park is ideal for astronomical observation.
5. The Ain Platform : Towards the east, beyond the metropolitan area of ​​Lyon, you will find rural areas suitable for observation.

Tips for a successful look

• Choose the right time : The best viewing conditions are when the sky is darkest, that is, from dawn to dusk.
• Avoid light pollution : Stay away from city lights to reduce their effect on the visibility of the comet.
• Talk to the moon phases : A night without a moon, or with a faint moon, is best.
• Prepare the equipment :
  • To the naked eye : If the size of the comet meets predictions, it will be visible without an instrument.
  • Binoculars : They improve visibility and make it possible to distinguish between the tail and the coma of the comet.
  • Telescope : For a detailed study, especially of the nucleus.
• View adapter : Avoid direct light sources to allow your eyes to adjust to darkness (about 20 minutes).
• Check the weather : Clear skies are essential. Check the weather forecast before planning your trip.

Take part in astronomical events in Lyon

• Vaulx-en-Velin Planetarium : Offers sessions and workshops on astronomy. They could organize special comet viewing events.
• Astronomical Society of Lyon : Organizing observation nights and conferences regularly. This is an opportunity to benefit from the knowledge of enthusiasts and access to professional equipment.

Understanding the significance of Comet Tsuchinshan-ATLAS

• A scientific study : Comets are witnesses of the first moments of the solar system. Analyzing their composition will allow us to better understand the formation of planets.
• An unusual philosophy : Comets visible to the naked eye are very rare. This is a great opportunity for astronomy enthusiasts.

Precautions to be taken when viewing

• Personal security : If you are going to remote places, contact someone who likes your destination and bring clothes suitable for overnight conditions.
• Respect for the environment : Leave no trace on your trail. Respect nature and your private property.

Comet Tsuchinshan-ATLAS promises to be one of the major astronomical events of 2024. By preparing now and choosing the best observation sites around Lyonyou will increase your chances of fully enjoying this celestial sight. Remember to stay informed about science updates, as predictions can change as the comet gets closer.