61 Danaë
| |
Discovery [1] | |
---|---|
Discovered by | H. Goldschmidt |
Discovery site | Paris |
Discovery date | 9 September 1860 |
Designations | |
MPC designation | (61) Danaë |
Pronunciation | /ˈdænəjiː/ DAN-ə-yee |
Named after | Danaë (Greek mythology)[2] |
1953 RL1 · A917 SM | |
main-belt · (outer) [3] background [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 151.67 yr (55,398 days) |
Aphelion | 3.4798 AU |
Perihelion | 2.4840 AU |
2.9819 AU | |
Eccentricity | 0.1670 |
5.15 yr (1,881 days) | |
157.11° | |
0° 11m 29.04s / day | |
Inclination | 18.212° |
333.72° | |
12.695° | |
Physical characteristics | |
Dimensions |
±4.3 km 82.04[5] ±2.73 km 82.52[6] ±1.02 km 83.56[7] ±1.962 km 85.125[8] ±2.151 km 85.937[9] ±3.50 km 91.00[10] |
Mass | ±2.78)×1018 kg (2.89[6] |
Mean density | ±9.49 g/cm3 9.81[6] |
11.45h[11] ±0.001 h 11.547[12] | |
±0.034 0.181[10] ±0.014 0.203[9] ±0.0472 0.2065[8] ±0.006 0.216[7] ±0.025 0.2224[5] | |
Tholen = S [1] SMASS = S [1][3] B–V = 0.852 [1] U–B = 0.402 [1] | |
±0.10 7.56[13] · 7.68[1][3][5][7][8][10] · ±0.25 7.78[14] | |
|
61 Danaë (/ˈdænəjiː/ DAN-ə-yee or /dəˈneɪ.ə/ də-NAY-ə) is a stony asteroid of 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.[15]
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.
In 1985, a study of lightcurve data suggested that Danaë may have a moon. If so, the main body would be an ellipsoid measuring 85×80×75 km (52x49x46 mi), and the moon would orbit 101 kilometres (63 mi) away, measuring 55×30×30 km (34x18x18 mi). The density of both would be 1.1 g/cm³.
References
- 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: 61 Danae" (2017-04-30 last obs.). Jet Propulsion Laboratory. Retrieved 2 November 2017.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (61) Danaë. Springer Berlin Heidelberg. p. 21. ISBN 978-3-540-00238-3. Retrieved 2 November 2017.
- 1 2 3 "LCDB Data for (61) Danaë". Asteroid Lightcurve Database (LCDB). Retrieved 2 November 2017.
- ↑ "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 2 November 2017.
- 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Archived from the original on 3 June 2016. Retrieved 2 November 2017.
- 1 2 3 Carry, B. (December 2012). "Density of asteroids" (PDF). Planetary and Space Science. 73 (1): 98–118. arXiv:1203.4336. Bibcode:2012P&SS...73...98C. doi:10.1016/j.pss.2012.03.009. Retrieved 2 November 2017. See Table 1.
- 1 2 3 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. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 2 November 2017.
- 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 2 November 2017.
- 1 2 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. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 2 November 2017.
- 1 2 3 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. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 2 November 2017.
- ↑ Wood, X. H. John; Kuiper, Gerard P. (May 1963). "Photometric Studies of Asteroids". Astrophysical Journal: 1279. Bibcode:1963ApJ...137.1279W. doi:10.1086/147603. Retrieved 2 November 2017.
- ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (61) Danaë". Geneva Observatory. Retrieved 2 November 2017.
- ↑ 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. Retrieved 2 November 2017.
- ↑ 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. Retrieved 2 November 2017.
- ↑ "61 Danae". Minor Planet Center. Retrieved 2 November 2017.
- Alberto Cellino, Renato Pannunzio, Vincenzo Zappalà, Paolo Farinella, and Paolo Paolicchi, 1985, Do we observe light curves of binary asteroids?, Astronomy and Astrophysics, Vol. 144, No. 2, pp. 355–362.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 61 Danaë at AstDyS-2, Asteroids—Dynamic Site
- 61 Danaë at the JPL Small-Body Database