| Discovery [1] | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 24 May 1931 |
| Designations | |
| (1195) Orangia | |
Named after | Orange Free State Province (in South Africa) [2] |
| 1931 KD ·1948 LB 1972 QA | |
| main-belt ·(inner) Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.55 yr (31,248 days) |
| Aphelion | 2.7110 AU |
| Perihelion | 1.8048 AU |
| 2.2579 AU | |
| Eccentricity | 0.2007 |
| 3.39 yr (1,239 days) | |
| 150.46° | |
| 0° 17m 25.8s / day | |
| Inclination | 7.1906° |
| 281.26° | |
| 328.27° | |
| Physical characteristics | |
| Dimensions | 5.90 km (calculated) [3] 6.258±0.604 km [4] |
| 6.167±0.0012 h [5] | |
| 0.237±0.053 [4] 0.24 (assumed) [3] | |
| S [3] | |
| 12.864±0.002(R) [5] ·13.2 [1] [4] ·13.31 [3] ·13.60±0.32 [6] | |
1195 Orangia, provisional designation 1931 KD, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 24 May 1931, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg, South Africa. [7] It was named after the Orange Free State Province. [2]
Orangia is a member of the Flora family, one of the largest families of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 5 months (1,239 days). Its orbit has an eccentricity of 0.20 and an inclination of 7° with respect to the ecliptic. [1] The asteroid's observation arc begins at Johannesburg, two weeks after its official discovery observation. [7]
In November 2010, a rotational lightcurve of Orangia was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 6.167 hours with a brightness amplitude of 0.20 magnitude ( U=2 ). [5]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Orangia measures 6.258 kilometers in diameter and its surface has an albedo of 0.237, [4] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of the Flora family – and calculates a diameter of 5.90 kilometers using an absolute magnitude of 13.31. [3]
This minor planet was named in honor of former South African Orange Free State Province that existed from 1910 to 1994. [2] The official naming citation was also mentioned in Paul Herget's The Names of the Minor Planets in 1955 ( H 111 ). [2]
