astro.wikisort.org - Asteroid

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]

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]
Alternative designations	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)
Aphelion	2.7110 AU
Perihelion	1.8048 AU
Semi-major axis	2.2579 AU
Eccentricity	0.2007
Orbital period (sidereal)	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°
Argument of perihelion	328.27°
Physical characteristics
Dimensions	5.90 km (calculated)[3] 6.258±0.604 km[4]
Synodic rotation period	6.167±0.0012 h[5]
Geometric albedo	0.237±0.053[4] 0.24 (assumed)[3]
Spectral type	S[3]
Absolute magnitude (H)	12.864±0.002 (R)[5] · 13.2[1][4] · 13.31[3] · 13.60±0.32[6]

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

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
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1195 Orangia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1195) Orangia

(1195) Orangia ist ein Asteroid des Hauptgürtels, der am 24. Mai 1931 vom südafrikanischen Astronomen Cyril V. Jackson in Johannesburg entdeckt wurde.

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- [en] 1195 Orangia

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