1195 Orangia

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
1195 Orangia
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date 24 May 1931
Designations
MPC designation (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[edit]

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[edit]

Lightcurve[edit]

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[edit]

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[edit]

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[edit]

  1. ^ 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. 
  2. ^ a b c d Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1195) Orangia. Springer Berlin Heidelberg. p. 100. ISBN 978-3-540-00238-3. Retrieved 15 August 2017. 
  3. ^ a b c d e f "LCDB Data for (1195) Orangia". Asteroid Lightcurve Database (LCDB). Retrieved 15 August 2017. 
  4. ^ 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 15 August 2017. 
  5. ^ 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:1504.04041Freely accessible. 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 15 August 2017. 
  7. ^ a b "1195 Orangia (1931 KD)". Minor Planet Center. Retrieved 15 August 2017. 

External links[edit]