1049 Gotho

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1049 Gotho
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date14 September 1925
(1049) Gotho
Named after
1925 RB · A906 DD
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc91.64 yr (33,470 days)
Aphelion3.5133 AU
Perihelion2.6726 AU
3.0930 AU
5.44 yr (1,987 days)
0° 10m 52.32s / day
Physical characteristics
Dimensions51.05 km (derived)[3]
53.56±16.68 km[4]
53.84±19.48 km[5]
54.77±0.76 km[6]
56.296±0.204 km[7]
63.874±0.177 km[8]
8.470±0.007 h[9]
0.0469 (derived)[3]
10.30[6] · 10.4[1][3][4] · 10.42[5] · 12.0[8]

1049 Gotho, provisional designation 1925 RB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 53 kilometers in diameter. It was discovered on 14 September 1925, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[10] Although the name of the asteroid is a masculine German name, it is not known to refer to a particular individual.[2]

Orbit and classification[edit]

Gotho orbits the Sun in the outer main-belt at a distance of 2.7–3.5 AU once every 5 years and 5 months (1,987 days). Its orbit has an eccentricity of 0.14 and an inclination of 15° with respect to the ecliptic.[1] First identified as A906 DD at Heidelberg in February 1906, the body's observation arc begins much later at Johannesburg in 1952, or 27 years after its official discovery observation.[10]

Physical characteristics[edit]

Gotho has been characterized as a C-type asteroid.[3]


In April 2010, a rotational lightcurve of Gotho was obtained by astronomer Kenda Albers at the Oakley Southern Sky Observatory, Australia. Lightcurve analysis gave a rotation period of 8.470 hours with a brightness variation of 0.17 magnitude (U=3-).[9]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Gotho measures between 53.56 and 56.296 kilometers in diameter and its surface has an albedo between 0.008 and 0.045 (without preliminary results).[4][5][6][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0469 and a diameter of 51.05 kilometers using an absolute magnitude of 10.4.[3]


For this minor planet, any reference of its name to a person or occurrence is unknown.[2]

Unknown meaning[edit]

Among the many thousands of named minor planets, Gotho is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 Eva and 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth (also see category).[11]


  1. ^ a b c d "JPL Small-Body Database Browser: 1049 Gotho (1925 RB)" (2017-05-04 last obs.). Jet Propulsion Laboratory. Retrieved 26 July 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1049) Gotho". Dictionary of Minor Planet Names – (1049) Gotho. Springer Berlin Heidelberg. p. 90. doi:10.1007/978-3-540-29925-7_1050. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g "LCDB Data for (1049) Gotho". Asteroid Lightcurve Database (LCDB). Retrieved 12 February 2017.
  4. ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 12 February 2017.
  5. ^ 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. Retrieved 12 February 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 17 October 2019. (online, AcuA catalog p. 153)
  7. ^ a b c 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. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 12 February 2017.
  8. ^ a b c 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.
  9. ^ a b Albers, Kenda; Kragh, Katherine; Monnier, Adam; Pligge, Zachary; Stolze, Kellen; West, Josh; et al. (October 2010). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2009 October thru 2010 April". The Minor Planet Bulletin. 37 (4): 152–158. Bibcode:2010MPBu...37..152A. ISSN 1052-8091. Retrieved 12 February 2017.
  10. ^ a b "1049 Gotho (1925 RB)". Minor Planet Center. Retrieved 12 February 2017.
  11. ^ Schmadel, Lutz D. (2007). "Appendix 11 – Minor Planet Names with Unknown Meaning". Dictionary of Minor Planet Names – Fifth Revised and Enlarged revision. Springer Berlin Heidelberg. pp. 927–929. ISBN 978-3-540-00238-3.

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