| Discovery[1] | |
|---|---|
| Discovered by | V. Albitzkij |
| Discovery site | Simeiz Obs. |
| Discovery date | 17 February 1925 |
| Designations | |
| (1330) Spiridonia | |
Named after | Spiridon Zaslavskij[2] (discoverer's brother-in-law) |
| 1925 DB · 1931 FA 1933 QK1 · 1942 ED 1950 OP · 1959 EZ A922 SA | |
| main-belt · (outer)[3] background[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 95.12 yr (34,741 days) |
| Aphelion | 3.4092AU |
| Perihelion | 2.9306 AU |
| 3.1699 AU | |
| Eccentricity | 0.0755 |
| 5.64yr (2,061 days) | |
| 104.05° | |
| 0° 10m 28.56s / day | |
| Inclination | 15.957° |
| 158.82° | |
| 4.4832° | |
| Physical characteristics | |
| Dimensions | 50.73±15.63 km[5] 51.96±16.95 km[6] 55.08±4.9 km[7] 55.17 km(derived)[3] 68.417±0.584 km[8] 69.917±1.110 km[9] 73.75±1.44 km[10] 78.496±27.90 km[11] |
| 9.626±0.002h[12] 9.67±0.01 h[13] 10.3±0.03 h[14] 10.3±0.3 h[14] 10.302±0.001 h[14] | |
| 0.029±0.001[10] 0.0297±0.0177[11] 0.0309±0.0051[9] 0.032±0.004[8] 0.0498±0.010[7] 0.0580(derived)[3] 0.06±0.04[6] 0.06±0.05[5] | |
| Tholen = P[1][3] B–V = 0.670[1] U–B = 0.170[1] | |
| 10.00[1][3][5][11] · 10.03[6] · 10.17[7][9][10] · 10.26±0.10[15] | |
1330 Spiridonia, provisional designation1925 DB, is a dark backgroundasteroid of primitive composition, located in the outer regions of theasteroid belt, approximately 65 kilometers in diameter. It was discovered on 17 February 1925, by Soviet astronomerVladimir Albitsky at theSimeiz Observatory on the Crimean peninsula.[16] The asteroid was named after the discoverer's brother-in-law, Spiridon Zaslavskij.[2]
Spiridonia is a non-family asteroid from the main belt'sbackground population.[4] It orbits the Sun in theouter asteroid belt at a distance of 2.9–3.4 AU once every 5 years and 8 months (2,061 days;semi-major axis of 3.17 AU). Its orbit has aneccentricity of 0.08 and aninclination of 16° with respect to theecliptic.[1]
The asteroid was first identified asA922 SA atHeidelberg Observatory in September 1922. The body'sobservation arc begins atYerkes Observatory in October 1934, more than 9 years after its official discovery observation at Simeiz.[16]
In theTholen classification,Spiridonia is a primitiveP-type asteroid.[1][3]
Several rotationallightcurves ofSpiridonia have been obtained from photometric observations since 2004.[12][13][14] Analysis of the best-rated lightcurve by American photometristRobert Stephens at the Santana Observatory(646) from April 2005, gave arotation period of 9.67 hours with a brightness amplitude of 0.16magnitude (U=3).[1][13]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Spiridonia measures between 50.73 and 78.496 kilometers in diameter and its surface has analbedo between 0.029 and 0.06.[5][6][7][8][9][10][11]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0580 and a diameter of 55.17 kilometers based on anabsolute magnitude of 10.0.[3]
1330 Spiridonia has been observed tooccult 5 stars between 1993 and 2023.
Thisminor planet was named after the discoverer's brother-in-law, Spiridon Zaslavskij (1883–1942), who was also the uncle of Viktorovich Zaslavskij (1925–1944), after whom the discoverer named the asteroid1030 Vitja.[2] The officialnaming citation was published by theMinor Planet Center on 15 July 1968 (M.P.C. 2882).[17]
