| Discovery[1] | |
|---|---|
| Discovered by | S. Belyavskyj |
| Discovery site | Simeiz Obs. |
| Discovery date | 18 May 1922 |
| Designations | |
| (978) Aidamina | |
Named after | Aida Minaevna (discoverer's friend)[2] |
| 1922 LY · 1929 YA 1946 QD · 1966 BD A906 VB · A923 YA | |
| main-belt · (outer)[3] background | |
| Orbital characteristics[1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.15 yr (40,232 days) |
| Aphelion | 3.9462AU |
| Perihelion | 2.4492 AU |
| 3.1977 AU | |
| Eccentricity | 0.2341 |
| 5.72yr (2,089 days) | |
| 119.30° | |
| 0° 10m 20.64s / day | |
| Inclination | 21.645° |
| 216.64° | |
| 132.94° | |
| Physical characteristics | |
| Dimensions | 78.73±2.3 km(IRAS:17)[4] 78.78±29.26 km[5] 79.54±22.88 km[6] 82.28±2.71 km[7] 92.105±0.764 km[8] |
| 9.5 h[9] 10.098±0.001 h[10] 10.099±0.004 h[11] 10.100±0.003h[12] | |
| 0.027±0.004[8] 0.035±0.002[7] 0.0365±0.002(IRAS:17)[4] 0.04±0.02[5] 0.04±0.03[6] | |
| B–V = 0.677[1] U–B = 0.252[1] Tholen =PF[1] · PF[3] | |
| 9.08±0.64[13] · 9.56[6] · 9.73[1][3][4][5][7][8] | |
978 Aidamina, provisional designation1922 LY, is a dark backgroundasteroid from the outer region of theasteroid belt, approximately 79 kilometers (49 miles) in diameter. It was discovered by astronomerSergey Belyavsky in 1922, and later named after Aida Minaevna, a friend of the discoverer's family.[2]
Aidamina was discovered on 18 May 1922, by Soviet–Russian astronomerSergey Belyavsky atSimeiz Observatory on the Crimean peninsula,[14] Twelve nights later, the body was independently discovered byMax Wolf atHeidelberg in Germany.[2]
In 1906, it was first observed asA906 VB at Heidelberg.Aidamina'sobservation arc begins atVienna, one month after its official discovery. TheMinor Planet Center's observational records do not include the body's discovery observation at Simeiz from May 1922.[14]
Aidamina is a non-family asteroid from the main belt'sbackground population. It orbits the Sun in theouter asteroid belt at a distance of 2.4–3.9 AU once every 5 years and 9 months (2,089 days). Its orbit has aneccentricity of 0.23 and aninclination of 22° with respect to theecliptic.[1]
Thisminor planet was named after a friend of the discoverer's family, Aida Minaevna.[2] The author of theDictionary of Minor Planet Names,Lutz Schmadel, compiled this citation asking several Russian astronomers includingNikolai Chernykh for further information.[2]
In theTholen taxonomy,Aidamina is the only asteroid classified asPF-type asteroid,[15] a transitional class between the carbonaceousF-type and darkP-type asteroids, of which only a few dozens bodies are currently known.[16]
In 2003, three mostly fragmentarylightcurves ofAidamina were obtained by astronomers Maurice Clark atMontgomery College (9.5 hours; Δ0.1 mag;U=1),[9] French amateur astronomersLaurent Bernasconi and Jean-Gabriel Bosch (10.100 hours; Δ0.1 mag;U=1),[12] and a group of astronomers including Elaine Kirkpatrick atRose-Hulman Observatory in Indiana, United States (10.099 hours; Δ0.13 mag;U=2).[11]
In July 2014, a rather asymmetric bimodal lightcurve, obtained by a collaboration between American astronomers Frederick Pilcher and Andrea Ferrero, gave a more refinerotation period of 10.098 hours with a brightness variation of 0.24magnitude.(U=3).[10]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Aidamina measures between 78.73 and 82.28 kilometers in diameter, and its surface has a lowalbedo between 0.035 and 0.04 (without preliminary results).[4][5][6][7]
TheCollaborative Asteroid Lightcurve Link adopts the results obtained from 17 observations made by IRAS, that is, an albedo of 0.0365 and a diameter of 78.73 kilometers with anabsolute magnitude of 9.73.[3]
