1309 Hyperborea

1309 Hyperborea

Discovery[1]
Discovered by	Grigory Neujmin
Discovery site	Simeiz Observatory
Discovery date	11 October 1931
Designations
MPC designation	1309
Named after	Hyperborea
Alternative names	1931 TO
Minor planet category	outer main-belt asteroid [2]
Orbital characteristics[2][3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	96.55 yr (35266 days)
Aphelion	3.6884 AU (551.78 Gm)
Perihelion	2.7234 AU (407.41 Gm)
Semi-major axis	3.20593 AU (479.600 Gm)
Eccentricity	0.15050
Orbital period	5.74 yr (2096.7 d)
Mean anomaly	223.62°
Mean motion	0° 10^m 18.12^s / day
Inclination	10.279°
Longitude of ascending node	206.087°
Argument of perihelion	244.995°
Earth MOID	1.7578 AU (262.96 Gm)
Jupiter MOID	1.70796 AU (255.507 Gm)
Jupiter Tisserand parameter	3.150
Physical characteristics
Dimensions	57.15 kilometres (35.51 mi) ± 3.9 kilometres (2.4 mi) Mean diameter [4]
Mean radius	28.575±1.95 km
Rotation period	13.88 ± 0.02 hours,[5] 13.88 h (0.578 d) [2]
Geometric albedo	0.0450±0.007 [2][4]
Absolute magnitude (H)	10.20,[6] 10.4 [2]

1309 Hyperborea (1931 TO) is an outer main-belt asteroid discovered on October 11, 1931, by Grigory Neujmin at Simeiz Observatory.^[1] This asteroid was named for the homeland of the Hyperboreans a group of people from greek mythology.^[7]

References

1. "Discovery Circumstances: Numbered Minor Planets (1)-(5000)". IAU: Minor Planet Center. Archived from the original on 2 February 2009. Retrieved December 23, 2008.
2. "1309 Hyperborea (1931 TO)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 27 April 2016.
3. "(1309) Hyperborea". AstDyS. University of Pisa. Retrieved December 23, 2008.
4. Tedesco; et al. (2004). "Supplemental IRAS Minor Planet Survey (SIMPS)". IRAS-A-FPA-3-RDR-IMPS-V6.0. Planetary Data System. Archived from the original on 2010-01-17. Retrieved December 23, 2008.
5. Oliver; et al. (2008). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2008 March". The Minor Planet Bulletin 35 (4): 149–150. Bibcode:2008MPBu...35..149O.
6. Tholen (2007). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0. Planetary Data System. Archived from the original on June 11, 2008. Retrieved December 24, 2008.
7. Schmadel, Lutz (2003). Dictionary of minor planet names (fifth ed.). Germany: Springer. p. 107. ISBN 978-3-540-00238-3. Retrieved December 23, 2008. Discovered 1931 Oct. 11 ... Named ... region in Greek mythology

External links

• 1309 Hyperborea at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters