1213 Algeria

1213 Algeria
Discovery [1]
Discovered by G. Reiss
Discovery site Algiers Observatory
Discovery date 5 December 1931
Designations
MPC designation 1213 Algeria
Named after
 Algeria (country)[2]
1931 XD
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 84.42 yr (30836 days)
Aphelion 3.5397 AU (529.53 Gm)
Perihelion 2.7410 AU (410.05 Gm)
3.1404 AU (469.80 Gm)
Eccentricity 0.12717
5.57 yr (2032.7 d)
133.15°
0° 10m 37.596s / day
Inclination 13.066°
271.70°
108.08°
Earth MOID 1.77879 AU (266.103 Gm)
Jupiter MOID 2.00914 AU (300.563 Gm)
Jupiter Tisserand parameter 3.158
Physical characteristics
Dimensions 33.20 km[4]
34.46±0.67 km[5]
30.189±0.239 km[6]
33.51±0.78 km[7]
31±3 km[8]
33.08 km (derived)[3]
Mean radius
 16.60±2.35 km
16 h (0.67 d)[1][9]
0.0767[4]
0.076±0.003[5]
0.0934±0.0106[6]
0.057±0.010[7]
0.06±0.01[8]
0.0586 (derived)[3]
0.0767±0.027[1]
C [3]
11.1

    1213 Algeria, provisional designation 1931 XD, is a carbonaceous asteroid from the outer region of the asteroid belt, about 33 kilometers in diameter. It was discovered by French astronomer Guy Reiss at the North African Algiers Observatory on 5 December 1931.[10] Three nights later, the body was independently discovered by Belgian–American astronomer George Van Biesbroeck at Williams Bay in the U.S state of Wisconsin.[2]

    The dark C-type asteroid orbits the Sun at a distance of 2.7–3.5 AU once every 5 years and 7 months (2,029 days). Its orbit shows an eccentricity of 0.13 and is tilted by 13 degrees to the plane of the ecliptic. It has a rotation period of 16 hours[9] and an albedo between 0.06 and 0.09, according to the surveys carried out by the IRAS, Akari, and WISE/NEOWISE missions.[4][5][6][7][8]

    The minor planet was named in honour of the North African country Algeria, location of the discovering observatory and a French colony at the time.[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1213 Algeria (1931 XD)" (2015-10-11 last obs.). Jet Propulsion Laboratory. Retrieved 30 April 2016.
    2. 1 2 3 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1213) Algeria. Springer Berlin Heidelberg. p. 101. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 4 "LCDB Data for (1213) Algeria". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved November 2015.
    5. 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
    6. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
    7. 1 2 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. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved November 2015.
    8. 1 2 3 Alí-Lagoa, V.; de León, J.; Licandro, J.; Delbó, M.; Campins, H.; Pinilla-Alonso, N.; et al. (June 2013). "Physical properties of B-type asteroids from WISE data". Astronomy & Astrophysics 554: 16. arXiv:1303.5487. Bibcode:2013A&A...554A..71A. doi:10.1051/0004-6361/201220680. Retrieved November 2015.
    9. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1213) Algeria". Geneva Observatory. Retrieved November 2015.
    10. ↑ "1213 Algeria (1931 XD)". Minor Planet Center. Retrieved November 2015.

    External links


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