1147 Stavropolis

1147 Stavropolis (prov. designation: 1929 LF) is a stony background asteroid from the inner regions of the asteroid belt. It was discovered on 11 June 1929, by Georgian–Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[1] The S-type asteroid has a rotation period of 5.7 hours and measures approximately 14 kilometers (9 miles) in diameter. It was named after the Russian city of Stavropol.[2]

1147 Stavropolis
Shape model of Stavropolis from its lightcurve
Discovery [1]
Discovered byG. Neujmin
Discovery siteSimeiz Obs.
Discovery date11 June 1929
Designations
(1147) Stavropolis
Named after
Stavropol (Russian city) [2]
1929 LF · 1946 KA
Orbital characteristics [3]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc87.80 yr (32,068 days)
Aphelion2.7977 AU
Perihelion1.7439 AU
2.2708 AU
Eccentricity0.2320
3.42 yr (1,250 days)
271.25°
0° 17m 16.8s / day
Inclination3.8806°
265.22°
15.742°
Physical characteristics
Mean diameter
10.94±0.29 km[6]
13.430±0.197 km[7]
13.898±0.157 km[8]
13.92±0.84 km[9]
14.89 km (calculated)[10]
5.66070±0.00003 h[11]
  • (78.0°, −50.0°) (λ1/β1)[5]
  • (267.0°, −51.0°) (λ2/β2)[5]
0.145±0.019[9]
0.1460±0.0215[8]
0.155±0.036[7]
0.20 (assumed)[10]
0.406±0.058[6]
11.40[6] · 11.5[1][3][10] · 12.00[9][8]

    Orbit and classification

    Stavropolis is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5] It orbits the Sun in the inner asteroid belt at a distance of 1.7–2.8 AU once every 3 years and 5 months (1,250 days). Its orbit has an eccentricity of 0.23 and an inclination of 4° with respect to the ecliptic.[3] The body's observation arc begins at with its official discovery observation at Simeiz.[1]

    Naming

    This minor planet was named by the discover after the Russian city of Stavropol, located in northern Caucasus region. From 1936 to 1946, the city was named "Woroschilowsk". The naming was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 107).[2]

    Physical characteristics

    In the Bus–Binzel SMASS classification, Stavropolis is a common stony S-type asteroid,[3] while in the Bus–DeMeo classification, it is an Sw-subtype.[5]

    Rotation period and poles

    In September 2001, a rotational lightcurve of Stavropolis was obtained from photometric observations by Americans Larry Robinson and Brian Warner at the Sunflower (739) and Palmer Divide Observatory (716) in Kansas and Colorado, respectively. Lightcurve analysis gave a rotation period of 5.66±0.01 hours with a brightness variation of 0.42 magnitude (U=3).[12]

    In October 2015, another lightcurve was obtained by French amateur astronomer Pierre Antonini. It gave a well-defined period of 5.66070±0.00003 hours with an amplitude of 0.32 magnitude (U=3).[11] A 2016-published lightcurve, using modeled photometric data from the Lowell Photometric Database (LPD), gave a concurring period of 5.66079±0.00001 hours, as well as two spin axes of (78.0°, −50.0°) and (267.0°, −51.0°) in ecliptic coordinates (λ, β).[13]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Stavropolis measures between 10.94 and 13.898 kilometers in diameter and its surface has an albedo between 0.146 and 0.406,[6][7][8] while the Japanese Akari satellite found a diameter of 13.92 kilometers with an albedo of 0.145.[9] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 14.89 kilometers based on an absolute magnitude of 11.5.[10]

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    References
    1. "1147 Stavropolis (1929 LF)". Minor Planet Center. Retrieved 8 September 2017.
    2. Schmadel, Lutz D. (2007). "(1147) Stavropolis". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 97. doi:10.1007/978-3-540-29925-7_1148. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 1147 Stavropolis (1929 LF)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 8 September 2017.
    4. "Asteroid 1147 Stavropolis – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 14 March 2020.
    5. "Asteroid 1147 Stavropolis". Small Bodies Data Ferret. Retrieved 14 March 2020.
    6. 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. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 8 September 2017.
    7. 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 8 September 2017.
    8. 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. 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)
    10. "LCDB Data for (1147) Stavropolis". Asteroid Lightcurve Database (LCDB). Retrieved 8 September 2017.
    11. Behrend, Raoul. "Asteroids and comets rotation curves – (1147) Stavropolis". Geneva Observatory. Retrieved 8 September 2017.
    12. Robinson, L. E.; Warner, B. D. (March 2002). "A Collaborative Work on Three Asteroid Lightcurves: 506 Marion, 585 Bilkis, 1506 Xosa" (PDF). Minor Planet Bulletin. 29 (1): 6–7. Bibcode:2002MPBu...29....6R.
    13. Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 8 September 2017.
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