Asteroidal occultation by (3200)Phaethon

【Remark】
■ 2026.１０.３１   １２ｈ０２ｍ ＵＴ (21h02m JST)
  Star  ：UCAC4 641-108768    mag12.2
          =GSC 3169-01904
          RA 21h 17m 19.3540s Dec +38°01' 51.842"(J2000)
  Asteroid：(3200)Phaethon  mag15.5  dia 6.3km
  Drop mag：aprox 3.4mag  Max duration 0.26sec
  Area    ：Hokkaido,Japan
  Note    ：The target body of DESTINY+ flyby

 Prediction by JPL-Horizons & Gaia EDR3 Occultation data map. (update 2026.7.12)

 Occultation area Map based on JPL#1003 (update 2026.7.12)

■ 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 shape 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 641-108768  (mag12.2)
Asteroid : (3200)Phaethon  (mag15.5)



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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