1289 Kutaïssi

1289 Kutaïssi (prov. designation: 1933 QR) is a stony Koronian asteroid from the outer region of the asteroid belt. Discovered by Grigory Neujmin at Simeiz Observatory in 1933, it was later named after the Georgian city of Kutaisi. The S-type asteroid has a rotation period of 3.6 hours and measures approximately 22 kilometers (14 miles) in diameter.

1289 Kutaïssi

Modelled shape of Kutaïssi from its lightcurve
Discovery[1]
Discovered by	G. Neujmin
Discovery site	Simeiz Obs.
Discovery date	19 August 1933
Designations
MPC designation	(1289) Kutaïssi
Named after	Kutaisi (city in Georgia)[2]
Alternative designations	1933 QR · 1928 QD 1948 TJ2 · 1953 TO2 A893 GA · A919 UC
Minor planet category	main-belt · Koronis[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc	88.24 yr (32,228 days)
Aphelion	3.0411 AU
Perihelion	2.6783 AU
Semi-major axis	2.8597 AU
Eccentricity	0.0634
Orbital period (sidereal)	4.84 yr (1,766 days)
Mean anomaly	113.61°
Mean motion	0° 12m 13.68s / day
Inclination	1.6165°
Longitude of ascending node	193.19°
Argument of perihelion	117.39°
Physical characteristics
Mean diameter	19.20±0.45 km[4] 21.531±0.269 km[5] 22.610±0.158 km[6] 22.97±0.56 km[7] 25.53 km (derived)[3] 25.62±1.8 km (IRAS:4)[8]
Synodic rotation period	3.60 h[9]
Geometric albedo	0.1216 (derived)[3] 0.1374±0.021 (IRAS:4)[8] 0.1567±0.0371[6] 0.172±0.009[7] 0.245±0.023[4]
Spectral type	Tholen = S[1] B–V = 0.800[1] U–B = 0.380[1]
Absolute magnitude (H)	10.70±0.03 (R)[10] · 10.73[1][4][7][8] · 10.87[3][6][9]

Discovery

Kutaïssi was discovered on 19 August 1933, by Soviet astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula.^[11] It was independently discovered a few days later by Eugène Delporte at the Belgian Uccle Observatory on 25 August, as well as by Cyril Jackson at the South African Johannesburg Observatory on 11 September 1933.^[2] It was first observed as A893 GA at Heidelberg in 1893. The body's observation arc begins with its observation as 1928 QD at Simeiz in 1928, or 5 years prior to its official discovery observation.^[11]

Orbit and classification

Kutaïssi is a stony member of the Koronis family, a group consisting of about 200 known bodies, thought to have been formed at least two billion years ago in a catastrophic collision between two larger bodies. It orbits the Sun in the outer main-belt at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,766 days). Its orbit has an eccentricity of 0.06 and an inclination of 2° with respect to the ecliptic.^[1]

Naming

This minor planet was named after the city of Kutaisi, now the legislative capital of Georgia, and its second largest city, after the capital Tbilisi.^[2] The official naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 118).^[2]

Physical characteristics

Kutaïssi is a common stony S-type asteroid in the Tholen classification.^[1]

Rotation period

The first rotational light curve of Kutaïssi was obtained from photometric observations by American astronomer Richard Binzel in February 1984. It gave a rotation period of 3.60 hours with a brightness variation of 0.40 magnitude (U=3).^[9] In 1987 and 2004, a group of American astronomers obtained concurring light curves with a period of 3.624±0.001 and 3.624±0.006 hours and an amplitude of 0.30 and 0.42 magnitude, respectively (U=2/3).^[10][12]

Diameter and albedo

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, Kutaïssi measures between 19.20 and 25.62 kilometers in diameter, and its surface has an albedo between 0.1374 and 0.245.^{[4][5][6][7][8]} The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1216 and a diameter of 25.53 kilometers based on an absolute magnitude of 10.87.^[3]

References

1. "JPL Small-Body Database Browser: 1289 Kutaissi (1933 QR)" (2016-11-10 last obs.). Jet Propulsion Laboratory. Retrieved 20 January 2017.
2. Schmadel, Lutz D. (2007). "(1289) Kutaïssi". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 106. doi:10.1007/978-3-540-29925-7_1290. ISBN 978-3-540-00238-3.
3. "LCDB Data for (1289) Kutaïssi". Asteroid Lightcurve Database (LCDB). Retrieved 20 January 2017.
4. 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 20 January 2017.
5. 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 20 January 2017.
6. 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.
7. 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)
8. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
9. Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus. 72 (1): 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN 0019-1035.
10. Slivan, Stephen M.; Binzel, Richard P.; Kaasalainen, Mikko; Hock, Andrew N.; Klesman, Alison J.; Eckelman, Laura J.; et al. (April 2009). "Spin vectors in the Koronis family. II. Additional clustered spins, and one stray". Icarus. 200 (2): 514–530. Bibcode:2009Icar..200..514S. doi:10.1016/j.icarus.2008.11.025.
11. "1289 Kutaissi (1933 QR)". Minor Planet Center. Retrieved 20 January 2017.
12. Ditteon, R. (September 2002). "Asteroid Photometry at Oakley Observatory" (PDF). Minor Planet Bulletin. 29 (1): 55. Bibcode:2002MPBu...29...55D. Archived from the original (PDF) on 4 October 2021. Retrieved 16 March 2020.

External links

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1289 Kutaïssi at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1289 Kutaïssi at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters