| Discovery[1] | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 28 September 1952 |
| Designations | |
| (1988) Delores | |
Named after | Delores Owings (Indiana University)[2] |
| 1952 SV · 1951 GF1 1952 UU · 1971 UE 1973 GH | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 64.59 yr (23,591 days) |
| Aphelion | 2.3749AU |
| Perihelion | 1.9336 AU |
| 2.1543 AU | |
| Eccentricity | 0.1024 |
| 3.16yr (1,155 days) | |
| 226.97° | |
| 0° 18m 42.12s / day | |
| Inclination | 4.2519° |
| 106.38° | |
| 235.01° | |
| Physical characteristics | |
| Dimensions | 4.60 km(calculated)[3] 5.761±0.035 km[1][4] 5.818±0.097 km[5] |
| 88.1521±0.3555h[6] | |
| 0.1895±0.0252[5] 0.193±0.024[1][4] 0.24(assumed)[3] | |
| S[3] | |
| 13.401±0.002(R)[6] · 13.6[1][5] · 13.85[3] | |
1988 Delores, provisional designation1952 SV, is a stony Florianasteroid from the inner regions of theasteroid belt, approximately 5 kilometers in diameter.
It was discovered on 28 September 1952, byIU'sIndiana Asteroid Program at theGoethe Link Observatory near Brooklyn, Indiana, United States, and named after Delores Owings, a member of the program.[7]
Delores is a stonyS-type asteroid and member of theFlora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in theinner main-belt at a distance of 1.9–2.4 AU once every 3 years and 2 months (1,155 days).
Its orbit has aneccentricity of 0.10 and aninclination of 4° with respect to theecliptic.[1] It was first observed as1951 GF1 at theMcDonald Observatory in April 1951, yet the astrometric data from this observation remained unused to extend the body'sobservation arc prior to its official discovery.[7]
A rotationallightcurve ofDelores was obtained at thePalomar Transient Factory in October 2012. It gave arotation period of 88 hours and a brightness variation of 0.74magnitude (U=2).[6]
While not being aslow rotator, a period of 88 hours is significantly above average, as most minor planets rotate once every 2–20 hours around their axis. It has also a high brightness amplitude, which typically indicates that the body has a non-spheroidal shape.
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Delores measures 5.8 kilometers in diameter and its surface has analbedo of 0.19,[4][5] while theCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 — derived from8 Flora, the family's largest member and namesake – and calculates a diameter of 4.6 kilometers with anabsolute magnitude of 13.85.[3]
Thisminor planet was named after Delores Owings, member in the Indiana Asteroid Program of Indiana University, collaborator withTom Gehrels on the determination of absolute magnitudes of minor planets, who became the program's supervisor ofastrometric measurements onphotographic plates. The naming was suggested byPaul Herget, the then director of theMinor Planet Center (MPC).[2] The officialnaming citation was published by theMinor Planet Center on 30 June 1977 (M.P.C. 4190).[8]
