1248 Jugurtha

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
1248 Jugurtha
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date 1 September 1932
Designations
MPC designation (1248) Jugurtha
Named after
Jugurtha (King of Numidia)[2]
1932 RO · 1930 DU
A901 VE · A915 XB
main-belt · (middle)
background [3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 115.97 yr (42,359 days)
Aphelion 2.7664 AU
Perihelion 2.6764 AU
2.7214 AU
Eccentricity 0.0165
4.49 yr (1,640 days)
259.89°
0° 13m 10.2s / day
Inclination 9.1383°
79.387°
347.25°
Physical characteristics
Dimensions 27.46±1.04 km[4]
28.468±0.193 km[5]
30.47±0.45 km[6]
31.12 km (calculated)[7]
33.559±0.209 km[8]
12.187±0.007 h[9]
12.1889±0.0004 h[9]
12.1897±0.0001 h[10]
12.190±0.002 h[11]
12.19047±0.00001 h[12]
12.910±0.002 h[11]
0.20 (assumed)[7]
0.2073±0.0471[8]
0.269±0.009[6]
0.282±0.033[4]
SMASS = S[1][7]
9.57±0.27[13] · 9.70[6][8] · 9.80[4] · 9.9[1][7]

1248 Jugurtha, provisional designation 1932 RO, is a stony background asteroid from the central regions of the asteroid belt, approximately 30 kilometers in diameter. Discovered by Cyril Jackson at the Union Observatory in 1932, the asteroid was named after Jugurtha, the ancient North African king of Numidia.

Discovery[edit]

Jugurtha was discovered on 1 September 1932, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg.[14] On 29 September 1932, it was independently by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula,[2] the Minor Planet Center only recognizes the first discoverer.[14]

Orbit and classification[edit]

Jugurtha is a non-family asteroid from the main belt's background population.[3] It orbits the Sun in the central main-belt at a distance of 2.7–2.8 AU once every 4 years and 6 months (1,640 days). Its orbit has an eccentricity of 0.02 and an inclination of 9° with respect to the ecliptic.[1]

The body's observation arc begins nearly 31 years prior to its official discovery, with its first observation as A901 VE at Heidelberg Observatory in November 1901.[14]

Physical characteristics[edit]

In the SMASS classification, Jugurtha is a common, stony S-type asteroid.[1][7]

Rotation period[edit]

Several rotational lightcurves of Jugurtha were obtained from photometric observations since 2001.[9][10][11][a] Lightcurve analysis gave a rotation period of 12.910 hours with a brightness amplitude between 0.70 and 1.40 magnitude (U=3).[11]

A modeled lightcurve, using photometric data from the Lowell Photometric Database, gave a concurring period of 12.19047 hours, as well as a spin axis of (254.0°, −89.0°) in ecliptic coordinates (λ, β).[12]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Jugurtha measures between 27.46 and 33.559 kilometers in diameter and its surface has an albedo between 0.2073 and 0.282.[4][5][6][8]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 31.12 kilometers based on an absolute magnitude of 9.9.[7]

Naming[edit]

This minor planet was named after Jugurtha (160–104 BC), a king of Numidia in North Africa, opposed to and defeated by Rome in the Jugurthine War (112–106 BC). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 115).[2]

Notes[edit]

  1. ^ Lightcurve plot of (1248) Jugurtha, Antelope Hills Observatory. rotation period 12.1897±0.0001 hours. Summary figures at the LCDB

References[edit]

  1. ^ a b c d e f "JPL Small-Body Database Browser: 1248 Jugurtha (1932 RO)" (2017-11-02 last obs.). Jet Propulsion Laboratory. Retrieved 2 January 2018. 
  2. ^ a b c Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (1248) Jugurtha. Springer Berlin Heidelberg. pp. 103–104. ISBN 978-3-540-00238-3. Retrieved 2 January 2018. 
  3. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 2 January 2018. 
  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 2 January 2018. 
  5. ^ a b Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos" (PDF). The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 2 January 2018. 
  6. ^ a b c d 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 2 January 2018. 
  7. ^ a b c d e f "LCDB Data for (1248) Jugurtha". Asteroid Lightcurve Database (LCDB). Retrieved 2 January 2018. 
  8. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 2 January 2018. 
  9. ^ a b c Behrend, Raoul. "Asteroids and comets rotation curves – (1248) Jugurtha". Geneva Observatory. Retrieved 2 January 2018. 
  10. ^ a b Koff, R. A.; Gross, J. (December 2002). "Lightcurve Photometry of Asteroid (1248) Jugurtha". The Minor Planet Bulletin. 29: 75–76. Bibcode:2002MPBu...29...75K. Retrieved 2 January 2018. 
  11. ^ a b c d Worman, Walter E.; Olson, Michael P. (June 2004). "CCD photometry of 1248 Jugurtha". The Minor Planet Bulletin. 31 (2): 42. Bibcode:2004MPBu...31...42W. ISSN 1052-8091. Retrieved 2 January 2018. 
  12. ^ a b Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909Freely accessible. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 2 January 2018. 
  13. ^ 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 2 January 2018. 
  14. ^ a b c "1248 Jugurtha (1932 RO)". Minor Planet Center. Retrieved 2 January 2018. 

External links[edit]