2340 Hathor

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2340 Hathor
Discovery 
U–B = 0.500[1]
20.2[1][6]

2340 Hathor (

ancient Egyptian goddess Hathor
.

Discovery

Hathor was discovered on 22 October 1976, by American astronomer

Eleanor Helin and is named for the ancient Egyptian deity Hathor.[2]

Independent discoveries

On 25 October 1976, Hathor was independently discovered by Eleanor Helin during the

William Lawrence Sebok, who photographed the same field almost simultaneously using Palomars 1.22-meter Schmidt telescope. On the same day, the official discoverer Charles Kowal found that Hathor had already been imaged three days earlier by Palomars 0.46-meter telescope (the same instrument used by PCAS). A fourth independent discovery was made several days later by Nikolai Chernykh at CrAO
on the Crimean peninsula.

The multiple discoveries were probably due to its very close approach distance to Earth.

Lincoln Laboratory ETS, and is now known as (363505) 2003 UC20.[7]
: 21 

Orbit and classification

Being a member of the

precoveries taken and no prior identifications made.[3] Its orbital solution includes non-gravitational force (A2).[1]

Close approaches

Hathor has an Earth

lunar distances (LD).[1]

When it was discovered in 1976, Hathor had one of its closest approaches to Earth at 0.007752 AU (1,160,000 km).[1] On 21 October 2014, when it passed Earth at 0.048 AU, or 18.8 LD, it was observed 22 times by the Goldstone Deep Space Network using radar astronomy over a period of 21 days from 10 to 31 October.[8] It will pass Earth again at 0.00658 AU (984,000 km) on 21 October 2069.[1]

Physical characteristics

In the

spectral type, respectively.[1]

Diameter and albedo

In the 1990s, Dutch–American astronomer

albedo of 0.15.[1] During its close approach to Earth in October 2014, a team of astronomer published a revised estimate of 210±30 meters for its diameter.[4] The Collaborative Asteroid Lightcurve Link adopts this diameter and derives an albedo of 0.3331 with an absolute magnitude of 20.2.[6]

Rotation period

In November 2014, American astronomer

U=3).[5]

Naming

In accordance with the custom to name all members of the Aten group after

M.P.C. 6060).[9]

References

  1. ^ a b c d e f g h i j k l m n o p q "JPL Small-Body Database Browser: 2340 Hathor (1976 UA)" (2021-12-05 last obs.). Jet Propulsion Laboratory. Archived from the original on 20 September 2020. Retrieved 3 July 2017.
  2. ^
    ISBN 978-3-540-00238-3
    .
  3. ^ a b c "2340 Hathor (1976 UA)". Minor Planet Center. Retrieved 6 January 2017.
  4. ^
    Bibcode:2014IAUC.9272....1G
    .
  5. ^
    ISSN 1052-8091
    .
  6. ^ a b c d "LCDB Data for (2340) Hathor". Asteroid Lightcurve Database (LCDB). Retrieved 6 January 2017.
  7. ^
    Bibcode:1984MPBu...11...19H
    .
  8. ^ Lance A. M. Benner (25 October 2014). "Goldstone Radar Observations Planning: 2340 Hathor, 2014 SM143, 2014 RQ17, 2014 TV, and 2014 SC324". NASA/JPL Asteroid Radar Research. Retrieved 6 January 2017.
  9. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 6 January 2017.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=2340_Hathor&oldid=1190801429"