_Dolores.png) Modelled shape ofDolores from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | G. Neujmin |
| Discovery site | Simeiz Obs. |
| Discovery date | 18 April 1933 |
| Designations | |
| (1277) Dolores | |
Named after | Dolores Ibárruri[2] (Spanish communists) |
| 1933 HA · 1925 SE 1929 NB · 1942 JA 1951 PB | |
| main-belt · (middle)[3] background[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.05 yr (30,699 days) |
| Aphelion | 3.3418AU |
| Perihelion | 2.0598 AU |
| 2.7008 AU | |
| Eccentricity | 0.2373 |
| 4.44yr (1,621 days) | |
| 315.34° | |
| 0° 13m 19.56s / day | |
| Inclination | 6.9674° |
| 247.04° | |
| 46.992° | |
| Physical characteristics | |
| 23.72±7.44 km[5] 27.05±0.90 km[6] 27.64±2.2 km[3][7] 32.587±0.802 km[8] 32.59±0.80 km[8] | |
| 17.19±0.01 h[9] | |
| 0.063±0.013[8] 0.08±0.04[5] 0.0879±0.016[3][7] 0.095±0.007[6] | |
| Tholen =C[1] SMASS = Cb[1] C[3][10] B–V = 0.730[1] U–B = 0.378[1] | |
| 11.05[1][3][5][6][7][8] 11.11±0.11[10] | |
1277 Dolores (prov. designation:1933 HA) is a carbonaceousbackground asteroid from the central regions of theasteroid belt, approximately 27 kilometers (17 miles) in diameter. It was discovered on 18 April 1933, by Soviet astronomerGrigory Neujmin at theSimeiz Observatory on the Crimean peninsula.[11] The asteroid was named after Spanish communistDolores Ibárruri.[2]
Dolores is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[4] It orbits the Sun in thecentral main belt at a distance of 2.1–3.3 AU once every 4 years and 5 months (1,621 days). Its orbit has aneccentricity of 0.24 and aninclination of 7° with respect to theecliptic.[1] The asteroid was first identified as1925 SE at Simeiz Observatory in September 1925. The body'sobservation arc begins atYerkes Observatory (or Simeiz) in June 1933, approximately 2 months after its official discovery observation.[11]
Thisminor planet was named after Spanish communistsDolores Ibárruri (1895–1989). Known as "La Pasionária" (Passionflower), she co-founded the communist party in Spain in 1920, and lead the party while in exile. Dolores Ibárruri returned to Spain in 1977, and became a member of the parliament. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 117).[2]
In theTholen classification,Dolores is a carbonaceousC-type asteroid, while in theSMASS classification, it is classified as a Cb-subtype, that transitions to the brighterB-type asteroids.[1] It has also been characterized as a C-type byPan-STARRS photometric survey.[10]
In July 2000, a rotationallightcurve ofDolores was obtained from photometric observations by American astronomerRobert Stephens. Lightcurve analysis gave a well-definedrotation period of 17.19 hours with a brightness amplitude of 0.45magnitude (U=3), indicative of a somewhat elongated shape.[9]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Dolores measures between 23.72 and 32.59 kilometers in diameter and its surface has analbedo between 0.063 and 0.095.[5][6][7][8] TheCollaborative Asteroid Lightcurve Link adopts the result obtained by IRAS, that is, an albedo of 0.0879 and a diameter of 27.64 kilometers based on anabsolute magnitude of 11.05.[3][7]
