1195 Orangia

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1195 Orangia
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date24 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
Dimensions5.90 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]

    Contents

    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]

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    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1195 Orangia (1931 KD)" (2016-12-11 last obs.). Jet Propulsion Laboratory . Retrieved 15 August 2017.
    2. 1 2 3 4 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. 1 2 3 4 5 6 "LCDB Data for (1195) Orangia". Asteroid Lightcurve Database (LCDB). Retrieved 15 August 2017.
    4. 1 2 3 4 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.
    5. 1 2 3 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.
    6. ↑ 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.
    7. 1 2 "1195 Orangia (1931 KD)". Minor Planet Center. Retrieved 15 August 2017.
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