Astronomy:1195 Orangia
| 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 | |
| Minor planet category | 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) |
| |{{{apsis}}}|helion}} | 2.7110 AU |
| |{{{apsis}}}|helion}} | 1.8048 AU |
| 2.2579 AU | |
| Eccentricity | 0.2007 |
| Orbital period | 3.39 yr (1,239 days) |
| Mean anomaly | 150.46° |
| Mean motion | 0° 17m 25.8s / day |
| Inclination | 7.1906° |
| Longitude of ascending node | 281.26° |
| 328.27° | |
| Physical characteristics | |
| Dimensions | 5.90 km (calculated)[3] 6.258±0.604 km[4] |
| Rotation period | 6.167±0.0012 h[5] |
| Geometric albedo | 0.237±0.053[4] 0.24 (assumed)[3] |
| S[3] | |
| Absolute magnitude (H) | 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 ({{{1}}}).[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
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1195 Orangia (1931 KD)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001195. Retrieved 15 August 2017.
- ↑ 2.0 2.1 2.2 2.3 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.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (1195) Orangia". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1195%7COrangia. Retrieved 15 August 2017.
- ↑ 4.0 4.1 4.2 4.3 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 15 August 2017.
- ↑ 5.0 5.1 5.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 15 August 2017.
- ↑ 7.0 7.1 "1195 Orangia (1931 KD)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1195. Retrieved 15 August 2017.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- 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
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