Asteroidal occultation by (3200)Phaethon

【Remark】
■ 2025.９.１９   １６ｈ５２ｍ ＵＴ (25h52m JST)
  Star  ：UCAC4 660-021020    mag13.1
          =GSC 02885-01025
          RA 04h 07m 38.8770s Dec +41°59' 10.512"(J2000)
  Asteroid：(3200)Phaethon  mag18.4  dia 5.0km
  Drop mag：aprox 5.3mag  Max duration 0.51sec
  Area    ：South Hokkaido, Japan
  Note    ：The target body of DESTINY+ flyby

 Prediction by JPL-Horizons & Gaia EDR3 Occultation data map. (update 2025.7.5)

 Occultation area Map based on JPL#908 (update 2025.7.5)

■ the Importance of this event
Asteroid (3200)Phaethon is the flyby target body for the DESTINY+ mission. Since we can only observe the object from the spacecraft for a very short time during the flyby mission, it is necessary to study the asteroid from the ground in advance. This occultation event is an excellent opportunity to determine the exact size and orbit of this asteroid before the spacecraft arrives.
Restrictions on publication of observation results
This observation will only be scientifically meaningful when the results of the multi-site observations are collected. The PI will collect data from all participants in the observing campaign, check the data set and analysis results with IOTA/EA, and open the results as soon as possible; the results of the IOTA/EA analysis will be the official results.

Star :UCAC4 660-021020  (mag13.1)
Asteroid : (3200)Phaethon  (mag18.4)



Wide Map
by The SKY 6


2deg square
by The SKY 6


40min square
by DSS

If you observed...
If you observed, please send to

Asteroidal report IOTA/EA. Reported observations will be published to world and be utilized for Occultation study.

Required Data are below;
1.Observers Name
2.Observed Place. longitude, latitude and altitude，Datum.
Longitude and latitude must have digits of 0.1"
Altitude must have digits of 1m
3.Observation start and end time (UTC)
4.Occultation occured or not.
5.Time of Disappearance and Reappearance (UTC), if the occultation phenomena occured
6.The occultation Light Curve, if the occultation occured
7.Equipment and methods: Telescope type and aperture, Camera, Length of frame exposure etc.
8.Time base: System(GPS or NTP etc.) and equipment

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Links...
IOTA/EA
JAXA / 深宇宙探査技術実証機 DESTINY+
千葉工業大学 惑星探査研究センター／深宇宙探査技術実証機 DESTINY+
PASJ／Multi-chord observation of stellar occultation by the near-Earth asteroid (3200) Phaethon on 2021 October 3 (UTC) with very high accuracy

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