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61 Danaë

From Wikipedia, the free encyclopedia
Main-belt asteroid

61 Danaë
Discovery[1]
Discovered byH. Goldschmidt
Discovery siteParis
Discovery date9 September 1860
Designations
(61) Danaë
Pronunciation/ˈdæneɪ.iː/[2]
Named after
Danaë(Greek mythology)[3]
1953 RL1 · A917 SM
main-belt · (outer)[4]
background[5]
AdjectivesDanaëan/dæneɪˈiːən/[6]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc151.67 yr (55,398 days)
Aphelion3.4798AU
Perihelion2.4840 AU
2.9819 AU
Eccentricity0.1670
5.15yr (1,881 days)
157.11°
0° 11m 29.04s / day
Inclination18.212°
333.72°
12.695°
Physical characteristics
Dimensions82.04±4.3 km[7]
82.52±2.73 km[8]
83.56±1.02 km[9]
85.125±1.962 km[10]
85.937±2.151 km[11]
91.00±3.50 km[12]
Mass(2.89±2.78)×1018 kg[8]
9.81±9.49 g/cm3[8]
11.45h[13]
11.547±0.001 h[14]
0.181±0.034[12]
0.203±0.014[11]
0.2065±0.0472[10]
0.216±0.006[9]
0.2224±0.025[7]
Tholen =S[1]
SMASS =S[1][4]
B–V = 0.852[1]
U–B = 0.402[1]
7.56±0.10[15] · 7.68[1][4][7][9][10][12] · 7.78±0.25[16]

61 Danaë (/ˈdæneɪ.iː/) is a stony (S-type)asteroid in the outerasteroid belt'sbackground population, approximately 84 kilometer in diameter. It was discovered by French astronomerHermann Goldschmidt on 9 September 1860, from his balcony inParis, France.[17] Goldschmidt was ill when asked to name the asteroid, and requested his fellow asteroid-hunterRobert Luther to name it instead. Luther chose to name it afterDanaë, the mother ofPerseus inGreek mythology.[3] Danaë was the first asteroid to have adiacritical character in its official name.

The asteroid is orbiting theSun with a period of 5.15 years and is rotating on its axis once every 11.45 hours. In 1985, a study oflightcurve data suggested that Danaë may have amoon. If so, the main body would be anellipsoid measuring 85 km × 80 km × 75 km (53 mi × 50 mi × 47 mi), and the moon would orbit 101 kilometres (63 mi) away, measuring 55 km × 30 km × 30 km (34 mi × 19 mi × 19 mi). The density of both would be1.1 g/cm3.[18]

References

[edit]
  1. ^abcdefg"JPL Small-Body Database Browser: 61 Danae" (2017-04-30 last obs.).Jet Propulsion Laboratory. Retrieved2 November 2017.
  2. ^"Danae".Lexico UK English Dictionary.Oxford University Press. Archived fromthe original on 29 February 2020.
  3. ^abSchmadel, Lutz D. (2007). "(61) Danaë".Dictionary of Minor Planet Names – (61) Danaë. Springer Berlin Heidelberg. p. 21.doi:10.1007/978-3-540-29925-7_62.ISBN 978-3-540-00238-3.
  4. ^abc"LCDB Data for (61) Danaë". Asteroid Lightcurve Database (LCDB). Retrieved2 November 2017.
  5. ^"Asteroid 61 Danae".Small Bodies Data Ferret. Retrieved24 October 2019.
  6. ^Charles Dickens (1852)Household Words, p. 207
  7. ^abcTedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004)."IRAS Minor Planet Survey V6.0".NASA Planetary Data System.12: IRAS-A-FPA-3-RDR-IMPS-V6.0.Bibcode:2004PDSS...12.....T. Retrieved22 October 2019.
  8. ^abcCarry, B. (December 2012). "Density of asteroids".Planetary and Space Science.73 (1):98–118.arXiv:1203.4336.Bibcode:2012P&SS...73...98C.doi:10.1016/j.pss.2012.03.009.S2CID 119226456. See Table 1.
  9. ^abcUsui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey".Publications of the Astronomical Society of Japan.63 (5):1117–1138.Bibcode:2011PASJ...63.1117U.doi:10.1093/pasj/63.5.1117. (online,AcuA catalog p. 153)
  10. ^abcMainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results".The Astrophysical Journal.741 (2): 25.arXiv:1109.6407.Bibcode:2011ApJ...741...90M.doi:10.1088/0004-637X/741/2/90.S2CID 118700974.
  11. ^abMasiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014)."Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos".The Astrophysical Journal.791 (2): 11.arXiv:1406.6645.Bibcode:2014ApJ...791..121M.doi:10.1088/0004-637X/791/2/121.S2CID 119293330. Retrieved2 November 2017.
  12. ^abcMasiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012)."Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids".The Astrophysical Journal Letters.759 (1): 5.arXiv:1209.5794.Bibcode:2012ApJ...759L...8M.doi:10.1088/2041-8205/759/1/L8.S2CID 46350317. Retrieved2 November 2017.
  13. ^Wood, X. H. John; Kuiper, Gerard P. (May 1963)."Photometric Studies of Asteroids".Astrophysical Journal.137: 1279.Bibcode:1963ApJ...137.1279W.doi:10.1086/147603. Retrieved2 November 2017.
  14. ^Behrend, Raoul."Asteroids and comets rotation curves – (61) Danaë". Geneva Observatory. Retrieved2 November 2017.
  15. ^Warner, Brian D. (December 2007)."Initial Results of a Dedicated H-G Project".The Minor Planet Bulletin.34 (4):113–119.Bibcode:2007MPBu...34..113W.ISSN 1052-8091. Retrieved2 November 2017.
  16. ^Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015)."Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results".Icarus.261:34–47.arXiv:1506.00762.Bibcode:2015Icar..261...34V.doi:10.1016/j.icarus.2015.08.007.S2CID 53493339. Retrieved2 November 2017.
  17. ^"61 Danae".Minor Planet Center. Retrieved2 November 2017.
  18. ^"Other reports of asteroid/TNO companions".www.johnstonsarchive.net. Retrieved13 September 2022.

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