Discovery[1] | |
---|---|
Discovered by | G. Neujmin |
Discovery site | Simeiz Obs. |
Discovery date | 5 September 1915 |
Designations | |
(917) Lyka | |
Named after | Lyka, a friend of the discoverer's sister[2] |
A915 RR · 1950 BS 1951 JJ · 1915 S4 1915 Σ4 | |
main-belt[1][3] · (inner) background[4][5] | |
Orbital characteristics[3] | |
Epoch 31 May 2020 (JD 2459000.5) | |
Uncertainty parameter 0 | |
Observation arc | 100.18 yr (36,591 d) |
Aphelion | 2.8590 AU |
Perihelion | 1.9035 AU |
2.3812 AU | |
Eccentricity | 0.2006 |
3.67 yr (1,342 d) | |
181.91° | |
0° 16m 5.52s / day | |
Inclination | 5.1264° |
343.38° | |
359.90° | |
Physical characteristics | |
7.867±0.006 h | |
X (S3OS2)[9] | |
11.6[1][3] | |
917 Lyka (prov. designation: A915 RR or 1915 S4) is a background asteroid, approximately 32 kilometers (20 miles) in diameter, located in the inner region of the asteroid belt. It was discovered on 5 September 1915, by Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[1] The X-type asteroid has a rotation period of 7.9 hours and is likely spherical in shape. It was named after Lyka, a friend of the discoverer's sister.[2]
MPC-object
was invoked but never defined (see the help page).springer
was invoked but never defined (see the help page).jpldata
was invoked but never defined (see the help page).AstDys-object
was invoked but never defined (see the help page).Ferret
was invoked but never defined (see the help page).SIMPS
was invoked but never defined (see the help page).AKARI
was invoked but never defined (see the help page).Masiero-2014
was invoked but never defined (see the help page).Lazzaro-2004
was invoked but never defined (see the help page).