2036 Sheragul

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2036 Sheragul
Discovery [1]
Discovered by N. Chernykh
Discovery site Crimea–Nauchnij
Discovery date 22 September 1973
MPC designation (2036) Sheragul
Named after
(Siberian village)[2]
1973 SY2 · 1929 PN
1929 PP · 1952 FJ1
1956 RN · A915 HC
main-belt · Flora[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 87.14 yr (31,829 days)
Aphelion 2.6601 AU
Perihelion 1.8296 AU
2.2449 AU
Eccentricity 0.1850
3.36 yr (1,229 days)
0° 17m 34.8s / day
Inclination 3.9724°
Physical characteristics
Dimensions 6.80±0.41 km[4]
6.988±0.080 km[5]
7.00±0.50 km[6]
7.241±0.031 km[7]
7.47 km (calculated)[3]
5.41±0.01 h[8]
5.413±0.001 h[9]
5.4203±0.0003 h[10]
5.42026±0.00015 h[11]
5.45±0.05 h[12]
0.24 (assumed)[3]
A[13] · S[3]
12.5[7] · 12.70[4][6] · 12.8[1][3] · 12.92±0.27[13]

2036 Sheragul, provisional designation 1973 SY2, is a rare-type Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. The asteroid was discovered on 22 September 1973, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.[14] It was named after the Russian village of Sheragul in eastern Siberia.[2]

Orbit and classification[edit]

Sheragul is a member of the Flora family, one of the largest collisional populations of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,229 days). Its orbit has an eccentricity of 0.19 and an inclination of 4° with respect to the ecliptic.[1]

In April 1915, it was first identified as A915 HC at the Hamburg Observatory in Germany. The body's observation arc begins 44 years prior to its official discovery observations, with its identifications 1929 PN and 1929 PP at Johannesburg Observatory in August 1929.[14]

Physical characteristics[edit]

Sheragul has been characterized as a rare A-type asteroid by Pan-STARRS photometric survey.[13]

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, Sheragul measures between 6.80 and 7.241 kilometers in diameter and its surface has an albedo between 0.300 and 0.3383.[4][5][6][7]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of its family – and subsequently calculates a larger diameter of 7.47 kilometers based on an absolute magnitude of 12.8.[3]

Lightcurves and poles[edit]

Between 2003 and 2014, a large number of rotational lightcurve of Sheragul were obtained from photometric observations by astronomer Maurice Clark at Rosemary Hill Observatory in Florida, and Preston Gott Observatory in Texas, respectively. Lightcurve analysis gave a rotation period of 5.4130 hours with a brightness variation of 0.58 magnitude (U=3/3/3/3-/3-/3/3).[8][9][10][11]

The asteroid was also observed during an international study of Florian asteroids by European astronomers in October 2007. It gave a concurring period of 5.45 hours with an exceptionally high amplitude of 1.5 magnitude, indicating the body has a non-spheroidal shape (U=3-).[12]

Based on his many photometric observations, astronomer Maurice Clark also modeled the shape of Sheragul and obtained two spin axis with (306.0°, −35.8°) and (117.3°, −28.9°) in ecliptic coordinates (λ, β), respectively (U=3-;Q=1). His observations also suggest that the asteroid is in a retrograde rotation.[10]


This minor planet was named after the Russian village of Sheragul in Irkutsk Oblast, southeastern Siberia, approximately 400 kilometers northwest of Lake Baikal. The name also honors the people of this village, where Nikolai Chernykh spent his school years.[2] The approved naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 4482).[15]


  1. ^ a b c d "JPL Small-Body Database Browser: 2036 Sheragul (1973 SY2)" (2016-09-29 last obs.). Jet Propulsion Laboratory. Retrieved 28 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2036) Sheragul. Springer Berlin Heidelberg. p. 165. ISBN 978-3-540-00238-3. Retrieved 28 June 2017. 
  3. ^ a b c d e f "LCDB Data for (2036) Sheragul". Asteroid Lightcurve Database (LCDB). Retrieved 28 June 2017. 
  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. Bibcode:2012ApJ...759L...8M. arXiv:1209.5794Freely accessible. doi:10.1088/2041-8205/759/1/L8. Retrieved 28 June 2017. 
  5. ^ 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. Bibcode:2014ApJ...791..121M. arXiv:1406.6645Freely accessible. doi:10.1088/0004-637X/791/2/121. Retrieved 28 June 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" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 28 June 2017. 
  7. ^ 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 28 June 2017. 
  8. ^ a b Clark, Maurice (March 2004). "Rosemary Hill Observatory photometry of asteroids 2036 Sheragul and (21652) 1999 OQ2". The Minor Planet Bulletin. 31 (1): 15–16. Bibcode:2004MPBu...31...15C. ISSN 1052-8091. Retrieved 28 June 2017. 
  9. ^ a b Clark, Maurice (October 2011). "Asteroid Lightcurves from the Preston Gott and McDonald Observatories". The Minor Planet Bulletin. 38 (4): 187–189. Bibcode:2011MPBu...38..187C. ISSN 1052-8091. Retrieved 28 June 2017. 
  10. ^ a b c Clark, Maurice (January 2016). "Shape Modelling of Asteriods 1708 Polit, 2036 Sheragul, and 3015 Candy". The Minor Planet Bulletin. 43 (1): 80–86. Bibcode:2016MPBu...43...80C. ISSN 1052-8091. Retrieved 28 June 2017. 
  11. ^ a b Clark, Maurice (July 2015). "Asteroid Photometry from the Preston Gott Observatory". The Minor Planet Bulletin. 42 (3): 163–166. Bibcode:2015MPBu...42..163C. ISSN 1052-8091. Retrieved 28 June 2017. 
  12. ^ a b Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; Ivanova, V.; Apostolovska, G.; et al. (October 2012). "Do Slivan states exist in the Flora family?. I. Photometric survey of the Flora region". Astronomy and Astrophysics. 546: 51. Bibcode:2012A&A...546A..72K. doi:10.1051/0004-6361/201219199. Retrieved 28 June 2017. 
  13. ^ a b c 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 28 June 2017. 
  14. ^ a b "2036 Sheragul (1973 SY2)". Minor Planet Center. Retrieved 28 June 2017. 
  15. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 28 June 2017. 

External links[edit]