1958 Chandra

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1958 Chandra
Discovery [1]
Discovered by C. U. Cesco
Discovery site El Leoncito
(Yale–Columbia Station)
Discovery date 24 September 1970
Designations
MPC designation (1958) Chandra
Named after
Subrahmanyan Chandrasekhar
(astrophysicist)[2]
1970 SB · 1947 HD
1959 RG1 · 1965 UN
1971 XA
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 62.09 yr (22,680 days)
Aphelion 3.6217 AU
Perihelion 2.5828 AU
3.1022 AU
Eccentricity 0.1674
5.46 yr (1,996 days)
197.52°
0° 10m 49.44s / day
Inclination 10.561°
345.04°
319.04°
Physical characteristics
Dimensions 33.82 km (derived)[3]
34.278±0.220[4]
36.167±0.349 km[5]
7.0571±0.0029 h[6]
7.070±0.004 h[7]
0.0511 (derived)[3]
0.0709±0.0138[5]
0.082±0.007[4]
C[3]
10.7[5] · 11.102±0.003 (R)[6] · 11.18±0.18[8] · 11.2[1][3]

1958 Chandra, provisional designation 1970 SB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 35 kilometers in diameter.

It was discovered on 24 September 1970, by Argentinian astronomer Carlos Cesco at the Yale–Columbia Southern Station of the Leoncito Astronomical Complex in San Juan, Argentina (also see Félix Aguilar Observatory).[9] It was named after astrophysicist Subrahmanyan Chandrasekhar.[2]

Orbit and classification[edit]

Chandra is a dark C-type asteroid that orbits the Sun in the outer main-belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (1,996 days). Its orbit has an eccentricity of 0.17 and an inclination of 11° with respect to the ecliptic.[1] The first used precovery was taken at Palomar Observatory in 1954, extending the asteroid's observation arc by 16 years prior to its discovery.[9]

Physical characteristics[edit]

Photometry[edit]

In December 2010, a rotational lightcurve was obtained for this asteroid from photometric observations at the U.S. Palomar Transient Factory, California. It gave a rotation period of 7.0571±0.0029 hours with a brightness variation of 0.35 magnitude (U=2).[6] A second lightcurve, obtained by Italian amateur astronomer Silvano Casulli in August 2014, gave a concurring period of 7.070±0.004 hours with an amplitude of 0.38 in magnitude (U=3-).[7]

Diameter and albedo[edit]

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 36.2 kilometers in diameter and its surface has an albedo of 0.07,[5] while the Collaborative Asteroid Lightcurve Link derives an albedo of 0.05 and a diameter of 33.8 kilometers, based on an absolute magnitude of 11.2.[3]

Naming[edit]

This minor planet was named in honor of Subrahmanyan Chandrasekhar (1910–1995), the Nobel Prize winning Indian–American theoretical astrophysicist (also see Chandrasekhar limit).[2] Naming citation was published on 1 November 1979 (M.P.C. 5013).[10]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 1958 Chandra (1970 SB)" (2016-11-09 last obs.). Jet Propulsion Laboratory. Retrieved 8 December 2016. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1958) Chandra. Springer Berlin Heidelberg. p. 157. ISBN 978-3-540-00238-3. Retrieved 25 August 2016. 
  3. ^ a b c d e f "LCDB Data for (1958) Chandra". Asteroid Lightcurve Database (LCDB). Retrieved 25 August 2016. 
  4. ^ 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". The Astrophysical Journal. 791 (2): 11. Bibcode:2014ApJ...791..121M. arXiv:1406.6645Freely accessible. doi:10.1088/0004-637X/791/2/121. Retrieved 8 December 2016. 
  5. ^ 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. Bibcode:2011ApJ...741...90M. arXiv:1109.6407Freely accessible. doi:10.1088/0004-637X/741/2/90. Retrieved 25 August 2016. 
  6. ^ 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. Bibcode:2015AJ....150...75W. arXiv:1504.04041Freely accessible. doi:10.1088/0004-6256/150/3/75. Retrieved 25 August 2016. 
  7. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1958) Chandra". Geneva Observatory. Retrieved 25 August 2016. 
  8. ^ 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. Bibcode:2015Icar..261...34V. arXiv:1506.00762Freely accessible. doi:10.1016/j.icarus.2015.08.007. Retrieved 25 August 2016. 
  9. ^ a b "1958 Chandra (1970 SB)". Minor Planet Center. Retrieved 25 August 2016. 
  10. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 25 August 2016. 

External links[edit]