_Lundmarka.png) Shape model ofLundmarka from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 16 July 1934 |
| Designations | |
| (1334) Lundmarka | |
Named after | Knut Lundmark(astronomer)[2] |
| 1934 OB | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 82.89 yr (30,274 days) |
| Aphelion | 3.1912AU |
| Perihelion | 2.6376 AU |
| 2.9144 AU | |
| Eccentricity | 0.0950 |
| 4.98yr (1,817 days) | |
| 286.14° | |
| 0° 11m 53.16s / day | |
| Inclination | 11.453° |
| 133.23° | |
| 129.65° | |
| Physical characteristics | |
| Dimensions | 27.62±2.33 km[4] 29.82±3.2 km(IRAS:14)[5] 30.35 km(derived)[3] |
| 6.250±0.003h[6] 6.25033±0.00001 h[7] | |
| 0.0600±0.016(IRAS:14)[5] 0.1455(derived)[3] 0.242±0.246[4] | |
| X[8] · C[3] | |
| 9.95[4] · 10.3[3] · 10.4[1] · 10.71±0.20[8] | |
1334 Lundmarka, provisional designation1934 OB, is a carbonaceousasteroid from the outer region of theasteroid belt, approximately 30 kilometers in diameter. It was discovered on 16 July 1934, by German astronomerKarl Reinmuth atHeidelberg Observatory in southern Germany, and named after Swedish astronomerKnut Lundmark.[2][9]
Lundmarka is classified asC-type andX-type asteroid by theLCDB andPan-STARRS, respectively.[3][8] It orbits the Sun in theouter main-belt at a distance of 2.6–3.2 AU once every 4 years and 12 months (1,817 days). Its orbit has aneccentricity of 0.10 and aninclination of 11° with respect to theecliptic.[1] The body'sobservation arc begins with its official discovery observation at Heidelberg, as noprecoveries were taken and no prior identifications were made.[9]
A rotationallightcurve ofLundmarka was obtained from photometric observations made at the AustralianOakley Southern Sky Observatory (E09) in September 2014. The lightcurve gave arotation period of6.250±0.003 hours with a brightness variation of 0.70 inmagnitude (U=3-).[6]
In March 2016, a second period was published based on data from the Lowell Photometric Database. Using lightcurve inversion and convex shape models, as well as distributed computing power and the help of individual volunteers, a period of6.25033±0.00001 hours was derived from the database's sparse-in-time photometry data (U=n.a.).[7]
According to the surveys carried out by the Infrared Astronomical Satellite (IRAS) and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Lundmarka measures 29.8 and 27.6 kilometers in diameter, respectively, and its surface has a correspondingalbedo of 0.06 and 0.24.[1][4] TheCollaborative Asteroid Lightcurve Link derives an intermediary albedo of 0.146 and a diameter of 30.4 kilometers.[3]
Thisminor planet was named in memory of Swedish astronomerKnut Lundmark (1889–1958), who was the head of theLund Observatory. He thoroughly analyzed galaxies andglobular clusters, and pioneered inmeasuring galactic distances and absolute stellar magnitudes. Lundmark also appeared in national radio with programs onpopular astronomy and the history of science. The officialnaming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 121).[2] The lunar craterLundmark is also named in his honour.[2]
