| 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]
Orbit and classification
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]
Physical characteristics
Lightcurve
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]
Diameter and albedo
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]
Naming
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]
References
- ^ a b c d "JPL Small-Body Database Browser: 1195 Orangia (1931 KD)" (2016-12-11 last obs.). Jet Propulsion Laboratory. Retrieved 15 August 2017.
- ^ a b c d Schmadel, Lutz D. (2007). "(1195) Orangia". Dictionary of Minor Planet Names – (1195) Orangia. Springer Berlin Heidelberg. p. 100. doi: 10.1007/978-3-540-29925-7_1196. ISBN 978-3-540-00238-3.
- ^ a b c d e f "LCDB Data for (1195) Orangia". Asteroid Lightcurve Database (LCDB). Retrieved 15 August 2017.
- ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv: 1209.5794. Bibcode: 2012ApJ...759L...8M. doi: 10.1088/2041-8205/759/1/L8. Retrieved 15 August 2017.
- ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv: 1504.04041. Bibcode: 2015AJ....150...75W. doi: 10.1088/0004-6256/150/3/75. Retrieved 15 August 2017.
- ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762. Bibcode: 2015Icar..261...34V. doi: 10.1016/j.icarus.2015.08.007. Retrieved 15 August 2017.
- ^ a b "1195 Orangia (1931 KD)". Minor Planet Center. Retrieved 15 August 2017.
External links
- Asteroid Lightcurve Database (LCDB), query form ( info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1195 Orangia at AstDyS-2, Asteroids—Dynamic Site
- 1195 Orangia at the JPL Small-Body Database
