1189 Terentia

1189 Terentia, provisional designation 1930 SG, is a carbonaceous Terentian asteroid from the outer regions of the asteroid belt, approximately 56 kilometers in diameter and the namesake of its family. The asteroid was discovered by Russian astronomer Grigory Neujmin at Simeiz Observatory on 17 September 1930.[15]

1189 Terentia
Modelled shape of Terentia from its lightcurve
Discovery[1]
Discovered byG. Neujmin
Discovery siteSimeiz Obs.
Discovery date17 September 1930
Designations
(1189) Terentia
Named after
Lidiya Terent'eva
(orbit computer)[2]
1930 SG · 1935 SK2
A915 TJ
main-belt · (outer)[3]
Terentia[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc101.46 yr (37,057 days)
Aphelion3.2681 AU
Perihelion2.5914 AU
2.9298 AU
Eccentricity0.1155
5.01 yr (1,832 days)
103.65°
0° 11m 47.4s / day
Inclination9.8671°
275.24°
95.571°
Physical characteristics
Dimensions55.40±14.41 km[5]
55.88±3.2 km[6]
55.94 km (derived)[3]
57.23±17.09 km[7]
59.246±0.201 km[8]
61.140±1.045 km[9]
62.81±0.85 km[10]
70.90±0.51 km[11]
19.30±0.01 h[12]
19.308±0.002 h[13]
0.042±0.006[11]
0.045±0.001[10]
0.0473±0.0053[9]
0.05±0.04[5][7]
0.0566±0.007[6]
0.0619 (derived)[3]
SMASS = Ch[1] · C[3]
9.80[5][11] · 9.84±0.26[14] · 9.9[1] · 9.96[7][3] · 10.00[6][9][10]

    Classification

    Terentia is the namesake of the Terentia family (618), a small asteroid family of less than a hundred known members of a carbonaceous C-type composition orbiting in the outer main-belt.[4]

    Orbit

    Terentia orbits the Sun at a distance of 2.6–3.3 AU once every 5.01 years (1,832 days). Its orbit has an eccentricity of 0.12 and an inclination of 10° with respect to the ecliptic.[1] The body's observation arc begins at Simeiz, 5 days after its official discovery observation.[15]

    Physical characteristics

    In the SMASS taxonomy, is classified as a Ch-type, a hydrated subtype of the carbonaceous C-type asteroids.[1]

    Naming

    This minor planet was named after Lidiya Terent'eva (1879–1933), female collaborator at the Simeis Observatory.[1]

    References
    1. "JPL Small-Body Database Browser: 1189 Terentia (1930 SG)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 16 August 2017.
    2. Schmadel, Lutz D. (2007). "(1189) Terentia". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 100. doi:10.1007/978-3-540-29925-7_1190. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1189) Terentia". Asteroid Lightcurve Database (LCDB). Retrieved 16 August 2017.
    4. Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
    5. 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 16 August 2017.
    6. 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.
    7. 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.
    8. 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 16 August 2017.
    9. 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.
    10. 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)
    11. 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 16 August 2017.
    12. Stephens, R. D. (September 2002). "Photometry of 973 Aralia, 1189 Terentia, 1040 Klumpkea, and 1998 Titius". The Minor Planet Bulletin. 29: 47–48. Bibcode:2002MPBu...29...47S. Retrieved 16 August 2017.
    13. Behrend, Raoul. "Asteroids and comets rotation curves – (1189) Terentia". Geneva Observatory. Retrieved 16 August 2017.
    14. 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. Retrieved 16 August 2017.
    15. "1189 Terentia (1930 SG)". Minor Planet Center. Retrieved 16 August 2017.

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