1123 Shapleya

1123 Shapleya ^[1]

Discovery
Discovered by	Neujmin, G.
Discovery date	21 September 1928
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	87.55 yr (31979 days)
Aphelion	2.5740346 AU (385.07010 Gm)
Perihelion	1.8774730 AU (280.86596 Gm)
Semi-major axis	2.2257538 AU (332.96803 Gm)
Eccentricity	0.1564777
Orbital period	3.32 yr (1212.9 d)
Mean anomaly	148.35946°
Mean motion	0° 17^m 48.54^s / day
Inclination	6.419413°
Longitude of ascending node	79.907072°
Argument of perihelion	317.54115°
Earth MOID	0.889687 AU (133.0953 Gm)
Jupiter MOID	2.8333 AU (423.86 Gm)
Jupiter Tisserand parameter	3.622
Physical characteristics
Rotation period	52.92 h (2.205 d)
Absolute magnitude (H)	11.6

1123 Shapleya is a main belt asteroid orbiting the Sun. It makes a revolution around the Sun once every 3 years. The time it takes to complete one rotation is greater than 20 hours. It was discovered by Grigory Nikolaevich Neujmin on September 21, 1928. Its provisional designation was 1928 ST.^[1] It was named after Harlow Shapley, the American astronomer and director of Harvard Observatory.^[2]

References

1. "JPL Small-Body Database Browser". Retrieved 1 May 2016.
2. Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer. ISBN 3-540-00238-3.

External links

• 1123 Shapleya at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters