2021 June 18 - Asteroid occultation event

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2021 June 18 - Asteroid occultation event

(276) Adelheid / UCAC4 481-091479 event on 2021 Jun 18, 19:48 UT

I've prepared finder charts from DSS and The Sky 6.
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IOTA/IOTA-ES occultation update for
(276) Adelheid / UCAC4 481-091479 event on 2021 Jun 18, 19:48 UT
Visible from China, SW Asia, Europe


Summary
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On 2021 Jun 18 UT, the 123.9 km diameter asteroid (276) Adelheid will occult a
12.4 mag star in the constellation Aquila for observers along a path across
China, SW Asia, Europe.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 1.70 mag to 13.83 mag (the magnitude of the asteroid) for at most
9.4 seconds.

This update is based on, astrometry for the asteroid kindly provided by the IAU
Minor Planet Center.

This work has made use of data from the European Space Agency (ESA)
mission Gaia (http://www.cosmos.esa.int/gaia), processed by the
Gaia Data Processing and Analysis Consortium
(DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium).
Funding for the DPAC has been provided by national institutions, in
particular the institutions participating in the Gaia Multilateral Agreement.

The event at a glimpse
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* Rank: 100
* date and approx. time of event: 2021 Jun 18, 19:40 - 2021 Jun 18, 19:55
* geocentric midpoint of event [JD]: 2459384.32527083
* magnitude of target star: 12.38
* magnitude drop [mag]: 1.70
* estimated maximum duration [s]: 9.4
* Moon: 57 % sunlit, 98° distance
* Sun: 145° distance
* rough path description: China, SW Asia, Europe

The occultation path
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* approximate projected width [km]: 137
* 1 sigma uncertainty interval [path widths]: +/- 0.07
* 1 sigma uncertainty interval [seconds]: +/- 1.1
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003)
* 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 79°)
* approx speed of asteroid's shadow [km/s]: 13.2124
* website for maps:
http://www.asteroidoccultation.com

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