1036 Ganymed

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For the moon of Jupiter, see Ganymede (moon).

1036 Ganymed
V–I = 0.981±0.005[12]
9.45[1][3][5][6][8][9]
9.50[10][14]

1036 Ganymed, provisional designation 1924 TD, is a stony

rotation period of 10.3 hours. In October 2024, it is predicted to approach Earth at a distance of 56,000,000 km; 35,000,000 mi (0.374097 AU).[15]

Orbit and classification

Ganymed is an

semi-major axis of 2.66 AU). Its orbit has a high eccentricity of 0.53 and an inclination of 27° with respect to the ecliptic.[3] The body's observation arc begins at the discovering observatory on 24 October 1924 (99 years ago) (1924-10-24), the night after its official discovery observation.[1]

Close approaches

Earth approach

Ganymed has a

lunar distance. Its next pass of the Earth will be at a distance of 0.374097 AU (56,000,000 km; 34,800,000 mi) on 13 October 2024 (5 months' time) (2024-10-13).[15]

Mars approach

Due to the high eccentricity of its orbit, Ganymed is also a

Mars-crosser, intersecting the orbit of the Red Planet at 1.66 AU. On 16 December 2176 (152 years' time) (2176-12-16), it will pass at a distance of 0.02868 AU (4,290,000 km; 2,670,000 mi) from Mars.[15]

Name

The minor planet of Ganymed was named after Ganymede from Greek mythology, using the German spelling ("Ganymed"). Ganymede was a Trojan prince abducted by Zeus to serve as a cup-bearer to the Greek gods. The name had previously also been given to Jupiter's third moon, "Ganymede", which was discovered in 1610 by Italian astronomer Galileo Galilei.[2]

Physical characteristics

Owing to its early discovery date, Ganymed has a rich observational history. A 1931 paper published the absolute magnitude, based on observations to date, as 9.24,[16] slightly brighter than the present value of 9.45.

Ganymed is a stony

orthopyroxenes, and possibly metals (although if metals are present they are covered and not readily apparent in the spectra).[13]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite

albedo between 0.218 and 0.293.[5][6][7][8][9]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2809 and a mean-diameter of 31.57 kilometers based on an absolute magnitude of 9.50.[10] Carry published a diameter 34.28±1.38 kilometers in 2012.[17]

An

occultation of a star by Ganymed was observed from California on 22 August 1985.[4] Additional observations in 2011 gave an occultation cross-section with a semi-major and minor axis of 39.3 and 18.9 kilometers, respectively.[4]

Rotation and poles

A large number of rotational

U=3-/3/3).[10][11]

Three studies using modeled photometric data from the Uppsala Asteroid Photometric Catalogue, WISE thermal infrared data and other sources, gave a concurring period of 10.313, 10.31284, and 10.31304 hours, respectively. Each modeled lightcurve also determined two spin axes of (214.0°, −73.0°), (190.0°, −78.0°), as well as (198.0°, −79.0°) in ecliptic coordinates (λ, β; L1/B1), respectively.[26][27][28]

In 1998, radar observations of Ganymed by the

Arecibo radio telescope produced images of the asteroid, revealing a roughly spherical object.[29] Polarimetric observations conducted by Japanese astronomers concluded that there was a weak correlation between the object's light- and polarimetry curve as a function of rotation angle.[30] Because polarization is dependent on surface terrain and composition, rather than the observed size of the object like the lightcurve, this suggests that the surface features of the asteroid are roughly uniform over its observed surface.[30]

References

  1. ^ a b c d e f "1036 Ganymed (1924 TD)". Minor Planet Center. Retrieved 29 August 2018.
  2. ^
    ISBN 978-3-540-00238-3
    .
  3. ^ a b c d e "JPL Small-Body Database Browser: 1036 Ganymed (1924 TD)" (2018-07-03 last obs.). Jet Propulsion Laboratory. Retrieved 29 August 2018.
  4. ^ a b c d e f "Asteroid 1036 Ganymed". Small Bodies Data Ferret. Retrieved 29 August 2018.
  5. ^
    Bibcode:2004PDSS...12.....T
    . Retrieved 12 March 2020.
  6. ^
    doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153
    )
  7. ^
    S2CID 239991
    .
  8. ^
    Bibcode:2016PDSS..247.....M
    . Retrieved 29 August 2018.
  9. ^
    S2CID 118700974. (catalog
    )
  10. ^ a b c d e "LCDB Data for (1036) Ganymed". Asteroid Lightcurve Database (LCDB). Retrieved 29 August 2018.
  11. ^
    ISSN 1052-8091
    . Retrieved 29 August 2018.
  12. ^
    doi:10.1016/j.pss.2017.12.019
    .
  13. ^
    Bibcode:2007LPI....38.1695F
    . Retrieved 29 August 2018.
  14. ^
    ISSN 0019-1035
    .
  15. ^ a b c "JPL Close-Approach Data: 1036 Ganymed (1924 TD)" (last observation: 2012-01-10). Retrieved 15 January 2012.
  16. doi:10.1002/asna.19312421104
    .
  17. S2CID 119226456
    See Table 1.
  18. Bibcode:1985BAAS...17R.726H
    .
  19. ISSN 0233-7665
    .
  20. ISSN 0320-930X
    .
  21. ISSN 1052-8091
    .
  22. Bibcode:2012ATsir1575....1V
    .
  23. Bibcode:2013LPI....44.2372V
    . Retrieved 29 August 2018.
  24. PMID 32455361
    .
  25. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (1036) Ganymed". Geneva Observatory. Retrieved 29 August 2018.
  26. doi:10.1006/icar.2002.6907
    .
  27. S2CID 118480799
    .
  28. S2CID 67813915
    .
  29. ^ "1036 Ganymed Radar Images".
  30. ^
    doi:10.1006/icar.2000.6396
    .

Further reading

External links
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