178 Belisana

178 Belisana

A three-dimensional model of 178 Belisana based on its light curve.
Discovery
Discovered by	J. Palisa, 1877
Discovery date	6 November 1877
Designations
Minor planet category	Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	130.00 yr (47482 d)
Aphelion	2.5663 AU (383.91 Gm)
Perihelion	2.3549 AU (352.29 Gm)
Semi-major axis	2.4606 AU (368.10 Gm)
Eccentricity	0.042961
Orbital period	3.86 yr (1409.8 d)
Mean anomaly	119.49°
Mean motion	0° 15^m 19.296^s / day
Inclination	1.8951°
Longitude of ascending node	51.109°
Argument of perihelion	212.85°
Earth MOID	1.33924 AU (200.347 Gm)
Jupiter MOID	2.44325 AU (365.505 Gm)
Jupiter Tisserand parameter	3.488
Physical characteristics
Mean radius	17.905±0.45 km
Rotation period	12.321 hours[2] 12.323 h (0.5135 d)[1]
Geometric albedo	0.2438±0.013
Spectral type	S
Absolute magnitude (H)	9.4

178 Belisana is a rocky main belt asteroid that was discovered by Austrian astronomer Johann Palisa on November 6, 1877. It is named after the Celtic goddess Belisana.

Photometric observations of this asteroid from multiple observatories during 2007 gave a light curve with a period of 12.321 ± 0.002 hours and a brightness variation of 0.10 ± 0.03 in magnitude. This is in agreement with a study performed in 1992. However, it is possible that the light curve may have a period of 24.6510 ± 0.0003 hours; it will require further study to exclude this solution.^[2]

References

1. Yeomans, Donald K., "178 Belisana", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 6 May 2016.
2. Oey, Julian; Krajewski, Ric (June 2008), "Lightcurve Analysis of Asteroids from Kingsgrove and Other Collaborating Observatories in the First Half of 2007", The Minor Planet Bulletin 35 (2), pp. 47–48, Bibcode:2008MPBu...35...47O.

External links

• 178 Belisana at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters