1112 Polonia

1112 Polonia

Discovery [1]
Discovered by	P. Shajn
Discovery site	Simeiz Observatory
Discovery date	15 August 1928
Designations
MPC designation	1112 Polonia
Named after	Poland[2]
Alternative names	1928 PE · 1933 PA A908 XA
Minor planet category	main-belt
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	87.68 yr (32024 days)
Aphelion	3.3407 AU (499.76 Gm)
Perihelion	2.6965 AU (403.39 Gm)
Semi-major axis	3.0186 AU (451.58 Gm)
Eccentricity	0.10670
Orbital period	5.24 yr (1915.6 d)
Mean anomaly	213.79°
Mean motion	0° 11^m 16.548^s / day
Inclination	8.9919°
Longitude of ascending node	302.87°
Argument of perihelion	87.500°
Earth MOID	1.71948 AU (257.231 Gm)
Jupiter MOID	2.12373 AU (317.705 Gm)
Jupiter Tisserand parameter	3.220
Physical characteristics
Mean radius	17.88±0.8 km
Rotation period	82.5 h (3.44 d)
Geometric albedo	0.1319±0.012
Spectral type	B–V = 0.797 U–B = 0.447 Tholen = S
Absolute magnitude (H)	10.05

1112 Polonia, provisional designation 1928 PE, is a main-belt asteroid orbiting the Sun at a distance of 2.7–3.4 AU. It was discovered by Pelageya Shajn on August 15, 1928, and independently discovered by her colleague Grigory Neujmin, both at Simeiz Observatory in Crimea. The 36-kilometer in diameter, S-type asteroid was the first to be discovered by a female astronomer.^[1][2]

The asteroid was given the Latin name of the country of Poland.^[2]

References

1. "JPL Small-Body Database Browser: 1112 Polonia (1928 PE)" (2015-08-02 last obs.). Jet Propulsion Laboratory. Retrieved 2 May 2016.
2. Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1112) Polonia. Springer Berlin Heidelberg. p. 94. ISBN 978-3-540-29925-7. Retrieved October 2015.

External links

• Dictionary of Minor Planet Names, Google books
• 1112 Polonia at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters