1470 Carla

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
1470 Carla
Discovery [1]
Discovered by A. Bohrmann
Discovery site Heidelberg Obs.
Discovery date 17 September 1938
Designations
MPC designation (1470) Carla
Named after
Carla Ziegler
(discoverer's friend)[2]
1938 SD · 1930 DE
1955 UN
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 78.15 yr (28,546 days)
Aphelion 3.3771 AU
Perihelion 2.9416 AU
3.1594 AU
Eccentricity 0.0689
5.62 yr (2,051 days)
1.2909°
0° 10m 31.8s / day
Inclination 3.2126°
358.43°
341.84°
Physical characteristics
Dimensions 31.66±10.19 km[4]
34.092±5.538 km[5]
34.28±0.84 km[6]
36.94 km (derived)[3]
36.97±1.1 km (IRAS:22)[7]
6.15±0.040 h[8]
6.1514±0.0002 h[9]
6.154±0.0028 h[10]
0.0470 (derived)[3]
0.0515±0.003 (IRAS:22)[7]
0.06±0.09[4]
0.0605±0.0181[5]
0.062±0.003[6]
C[3]
10.800±0.120 (R)[8] · 10.947±0.001 (R)[10] · 11.0[5][6] · 11.1[1][3] · 11.18[4] · 11.43±0.35[11]

1470 Carla, provisional designation 1938 SD, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 35 kilometers in diameter.

It was discovered on 17 September 1938, by German astronomer Alfred Bohrmann at Heidelberg Observatory in southwest Germany.[12] It was named after a friend of the discoverer's family, Carla Ziegler.[2]

Description[edit]

Carla orbits the Sun at a distance of 2.9–3.4 AU once every 5 years and 7 months (2,051 days). Its orbit has an eccentricity of 0.07 and an inclination of 3° with respect to the ecliptic.[1] It was first identified as 1930 DE at Heidelberg 1930. The body's observation arc, however, begins the night prior to its official discovery observation in 1938.[12]

Physical characteristics[edit]

Rotation period[edit]

In September 2011, a rotational lightcurve of Carla was obtained from photometric observations by astronomer Frederick Pilcher at Organ Mesa Observatory (G50) near Las Cruces, New Mexico. Lightcurve analysis gave a rotation period of 6.1514 hours with a brightness amplitude of 0.25 magnitude (U=3).[9] in 2014, two additional lightcurves in the R-band, obtained at the Palomar Transient Factory, California, gave a period of 6.15 and 6.154 hours with an amplitude of 0.24 and 0.25, respectively (U=2/2).[8][10]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Carla measures between 31.66 and 36.97 kilometers in diameter and its surface has an albedo of 0.051 and 0.062.[4][5][6][7] The Collaborative Asteroid Lightcurve Link classifies the body as a carbonaceous C-type asteroid, derives an albedo of 0.047 with a diameter of 36.94 kilometers and an absolute magnitude of 11.1.[3]

Naming[edit]

This minor planet was named in honor of Carla Ziegler, a friend of the Bohrmann family at Heidelberg.[2] Naming citation was published before November 1977 (M.P.C. 1129).[13]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 1470 Carla (1938 SD)" (2016-11-11 last obs.). Jet Propulsion Laboratory. Retrieved 3 April 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1470) Carla. Springer Berlin Heidelberg. pp. 117–118. ISBN 978-3-540-00238-3. Retrieved 3 April 2017. 
  3. ^ a b c d e f "LCDB Data for (1470) Carla". Asteroid Lightcurve Database (LCDB). Retrieved 3 April 2017. 
  4. ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923Freely accessible. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 3 April 2017. 
  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. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 3 April 2017. 
  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 3 April 2017.  Online catalog
  7. ^ a b c 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. Archived from the original on 2016-06-03. Retrieved 8 December 2016. 
  8. ^ a b c Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; et al. (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series. 219 (2): 19. arXiv:1506.08493Freely accessible. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. Retrieved 3 April 2017. 
  9. ^ a b Pilcher, Frederick (April 2012). "Rotation Period Determinations for 31 Euphrosyne, 65 Cybele, 154 Bertha 177 Irma, 200 Dynamene, 724 Hapag, 880 Herba, and 1470 Carla". The Minor Planet Bulletin. 39 (2): 57–60. Bibcode:2012MPBu...39...57P. ISSN 1052-8091. Retrieved 3 April 2017. 
  10. ^ 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 3 April 2017. 
  11. ^ 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 3 April 2017. 
  12. ^ a b "1470 Carla (1938 SD)". Minor Planet Center. Retrieved 3 April 2017. 
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 3 April 2017. 

External links[edit]