_Str%25C3%25B6mgrenia.png) Shape model ofStrömgrenia from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 23 August 1936 |
| Designations | |
| (1422) Stromgrenia | |
Named after | Elis Strömgren(astronomer)[2] |
| 1936 QF · 1933 WB | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 79.76 yr (29,134 days) |
| Aphelion | 2.6241AU |
| Perihelion | 1.8697 AU |
| 2.2469 AU | |
| Eccentricity | 0.1679 |
| 3.37yr (1,230 days) | |
| 291.18° | |
| 0° 17m 33.36s / day | |
| Inclination | 2.6809° |
| 201.61° | |
| 171.15° | |
| Physical characteristics | |
| Dimensions | 4.64±0.66 km[4] 4.87±0.34 km[5] 5.62 km(calculated)[3] 5.814±0.113 km[6] 6.025±0.027 km[7] |
| 3.5002±0.0102h(S)[3][8] 3.5298±0.0285 h(R)[8] | |
| 0.2093±0.0364[7] 0.224±0.022 0.24(assumed)[3] 0.320±0.045[5] 0.40±0.12[4] | |
| B–V = 0.868[1] U–B = 0.519[1] Tholen =S[1] · S[3][9] | |
| 13.051±0.003(R)[8] · 13.06±0.28[9] · 13.42[1][3][4][5][7] | |
1422 Strömgrenia, provisional designation1936 QF, is a stony Florianasteroid from the inner regions of theasteroid belt, approximately 5.5 kilometers in diameter. It was discovered on 23 August 1936, by German astronomerKarl Reinmuth atHeidelberg Observatory in southern Germany, and named after Swedish-Danish astronomerSvante Elis Strömgren.[2][10]
Strömgrenia is a member of theFlora family, a large group of stony asteroids in the inner main-belt. It orbits the Sun at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,230 days). Its orbit has aneccentricity of 0.17 and aninclination of 3° with respect to theecliptic.[1]It was first identified as1933 WB atUccle Observatory in 1933. The body'sobservation arc however begins with its official discovery observation at Heidelberg in 1936.[10]
Two rotationallight-curves ofStrömgrenia were obtained from photometric observations in the R and S band at thePalomar Transient Factory in April 2009. Light-curve analysis gave arotation period of 3.5002 and 3.5298 hours with a brightness variation of 0.24 and 0.29magnitude, respectively (U=2/2).[8]
On theTholen taxonomy,Strömgrenia'sspectral class is that of aS-type. According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, it measures between 4.64 and 6.03 kilometers in diameter, and its surface has analbedo between 0.209 and 0.40.[4][5][6][7] TheCollaborative Asteroid Lightcurve Link, assumes an albedo of 0.24 – derived from the asteroid8 Flora, the family's principal body and namesake – and calculates a diameter of 5.62 kilometers with anabsolute magnitude of 13.42.[3]
Thisminor planet was named in honor of Swedish-Danish astronomerSvante Elis Strömgren (1870–1947), professor of astronomy and director of theCopenhagen University Observatory.[2] Naming citation was first mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 128).[2]
