Wikipedia

1470 Carla

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

1470 Carla
Discovery[1]
Discovered byA. Bohrmann
Discovery siteHeidelberg Obs.
Discovery date17 September 1938
Designations
(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 arc78.15 yr (28,546 days)
Aphelion3.3771 AU
Perihelion2.9416 AU
3.1594 AU
Eccentricity0.0689
5.62 yr (2,051 days)
1.2909°
0° 10m 31.8s / day
Inclination3.2126°
358.43°
341.84°
Physical characteristics
Dimensions31.66±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]

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] The official naming citation was published by the Minor Planet Center in October 1954 (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). "(1470) Carla". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. pp. 117–118. doi:10.1007/978-3-540-29925-7_1471. ISBN 978-3-540-00238-3.
  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:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
  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". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID 35447010.
  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. (online, AcuA catalog p. 153)
  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 – IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 15 June 2018.
  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:1506.08493. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. S2CID 17093124. 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. S2CID 8342929. 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved 3 April 2017.
  12. ^ a b "1470 Carla (1938 SD)". Minor Planet Center. Retrieved 3 April 2017.
  13. ^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. Bibcode:2009dmpn.book.....S. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

External links edit

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