Astronomy:61 Danaë

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Short description: Main-belt asteroid
61 Danaë
61 Danae.gif
Discovery [1]
Discovered byH. Goldschmidt
Discovery siteParis
Discovery date9 September 1860
Designations
(61) Danaë
Pronunciation/ˈdæneɪ.iː/[5]
Named afterDanaë (Greek mythology)[2]
1953 RL1 · A917 SM
Minor planet categorymain-belt · (outer) [3]
background [4]
AdjectivesDanaëan /dæneɪˈiːən/[6]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc151.67 yr (55,398 days)
|{{{apsis}}}|helion}}3.4798 AU
|{{{apsis}}}|helion}}2.4840 AU
2.9819 AU
Eccentricity0.1670
Orbital period5.15 yr (1,881 days)
Mean anomaly157.11°
Mean motion0° 11m 29.04s / day
Inclination18.212°
Longitude of ascending node333.72°
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]
Mean density9.81±9.49 g/cm3[8]
Rotation period11.45 h[13]
11.547±0.001 h[14]
Geometric albedo0.181±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][3]
B–V = 0.852 [1]
U–B = 0.402 [1]
Absolute magnitude (H)7.56±0.10[15] · 7.68[1][3][7][9][10][12] · 7.78±0.25[16]


Danaë /ˈdæneɪ.iː/ (minor planet designation: 61 Danaë) is a stony (S-type) asteroid in the outer asteroid belt's background population, approximately 84 kilometer in diameter. It was discovered by French astronomer Hermann Goldschmidt on 9 September 1860, from his balcony in Paris, France.[17] Goldschmidt was ill when asked to name the asteroid, and requested his fellow asteroid-hunter Robert Luther to name it instead. Luther chose to name it after Danaë, the mother of Perseus in Greek mythology.[2] Danaë was the first asteroid to have a diacritical character in its official name.

The asteroid is orbiting the Sun with a period of 5.15 years and is rotating on its axis once every 11.45 hours. In 1985, a study of lightcurve data suggested that Danaë may have a moon. If so, the main body would be an ellipsoid 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 be 1.1 g/cm3.[18]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "JPL Small-Body Database Browser: 61 Danae". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000061. 
  2. ↑ 2.0 2.1 Schmadel, 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. 
  3. ↑ 3.0 3.1 3.2 "LCDB Data for (61) Danaë". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=61%7CDanaë. 
  4. ↑ "Asteroid 61 Danae". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=61+Danae. 
  5. ↑ "Danae". Danae. Oxford University Press. http://www.lexico.com/definition/Danae. 
  6. ↑ Charles Dickens (1852) Household Words, p. 207
  7. ↑ 7.0 7.1 7.2 Tedesco, 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. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019. 
  8. ↑ 8.0 8.1 8.2 Carry, B. (December 2012). "Density of asteroids". Planetary and Space Science 73 (1): 98–118. doi:10.1016/j.pss.2012.03.009. Bibcode: 2012P&SS...73...98C.  See Table 1.
  9. ↑ 9.0 9.1 9.2 Usui, 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  10. ↑ 10.0 10.1 10.2 Mainzer, 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. 
  11. ↑ 11.0 11.1 Masiero, 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. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 2 November 2017. 
  12. ↑ 12.0 12.1 12.2 Masiero, 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 2 November 2017. 
  13. ↑ Wood, X. H. John; Kuiper, Gerard P. (May 1963). "Photometric Studies of Asteroids.". Astrophysical Journal 137: 1279. doi:10.1086/147603. Bibcode: 1963ApJ...137.1279W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1963ApJ...137.1279W. Retrieved 2 November 2017. 
  14. ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (61) Danaë". Geneva Observatory. http://obswww.unige.ch/~behrend/page1cou.html#000061. 
  15. ↑ Warner, Brian D. (December 2007). "Initial Results of a Dedicated H-G Project". The Minor Planet Bulletin 34 (4): 113–119. ISSN 1052-8091. Bibcode: 2007MPBu...34..113W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34..113W. Retrieved 2 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 2 November 2017. 
  17. ↑ "61 Danae". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=61. 
  18. ↑ "Other reports of asteroid/TNO companions". http://www.johnstonsarchive.net/astro/asteroidmoonsq.html. 

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