169 Zelia

169 Zelia
Discovery
Discovered by	P. M. Henry, 1876
Discovery date	28 September 1876
Designations
MPC designation	(169) Zelia
Named after	Zélia
Minor planet category	Main belt
Orbital characteristics[1]
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	131.26 yr (47944 d)
Aphelion	2.6662 AU (398.86 Gm)
Perihelion	2.0511 AU (306.84 Gm)
Semi-major axis	2.3586 AU (352.84 Gm)
Eccentricity	0.13040
Orbital period	3.62 yr (1323.1 d)
Mean anomaly	249.62°
Mean motion	0° 16m 19.524s / day
Inclination	5.5001°
Longitude of ascending node	354.77°
Argument of perihelion	334.90°
Earth MOID	1.04119 AU (155.760 Gm)
Jupiter MOID	2.65309 AU (396.897 Gm)
TJupiter	3.535
Physical characteristics
Mean radius	16.80±1.3 km[1]; 19.3 ± 0.45 km[2]
Rotation period	14.537 h (0.6057 d)
Geometric albedo	0.178 ± 0.035[2]; 0.2347±0.041[1]
Spectral type	O (Bus & Binzel)[2]
Absolute magnitude (H)	9.56

Zelia (minor planet designation: 169 Zelia) is a main belt asteroid that was discovered by the brothers Paul Henry and Prosper Henry on September 28, 1876. Credit for this discovery was given to Prosper. It is named after a niece of the astronomer Camille Flammarion.[3] Initial orbital elements for this asteroid were published in 1877 by American astronomer H. A. Howe.[4]

Based upon its spectrum, this body is classified as a rare O-type asteroid in the taxonomic system of Bus & Binzel.[2] Photometric observations of this asteroid during 2009 gave a light curve with a period of 14.537 ± 0.001 hours and a brightness variation of 0.14 ± 0.03 in magnitude.[5]

References

Yeomans, Donald K., "169 Zelia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 6 May 2016.
Mainzer, A.; et al. (January 2012), "NEOWISE Studies of Asteroids with Sloan Photometry: Preliminary Results", The Astrophysical Journal, 745 (1): 7, arXiv:1110.4998, Bibcode:2012ApJ...745....7M, doi:10.1088/0004-637X/745/1/7.
Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 28, ISBN 978-3642297182.
Howe, H. A. (May 1877), "Elements of (169) Zelia", Astronomische Nachrichten, 89 (18): 279, Bibcode:1877AN.....89..279H, doi:10.1002/asna.18770891803.
Stephens, Robert D.; Pilcher, Frederick (October 2009), "Photometric Observations of 169 Zelia", The Minor Planet Bulletin, 36 (4): 161, Bibcode:2009MPBu...36..161S.

External links

169 Zelia at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
169 Zelia at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[JPL-1] Yeomans, Donald K., "169 Zelia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 6 May 2016.

[Mainzer2012-2] Mainzer, A.; et al. (January 2012), "NEOWISE Studies of Asteroids with Sloan Photometry: Preliminary Results", The Astrophysical Journal, 745 (1): 7, arXiv:1110.4998, Bibcode:2012ApJ...745....7M, doi:10.1088/0004-637X/745/1/7.

[Schmadel2012-3] Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 28, ISBN 978-3642297182.

[Howe1877-4] Howe, H. A. (May 1877), "Elements of (169) Zelia", Astronomische Nachrichten, 89 (18): 279, Bibcode:1877AN.....89..279H, doi:10.1002/asna.18770891803.

[StephensPilcher2009-5] Stephens, Robert D.; Pilcher, Frederick (October 2009), "Photometric Observations of 169 Zelia", The Minor Planet Bulletin, 36 (4): 161, Bibcode:2009MPBu...36..161S.