1084 Tamariwa

1084 Tamariwa, provisional designation 1926 CC, is a carbonaceous background asteroid approximately 27 kilometres in diameter from the central regions of the asteroid belt. It was discovered on 12 February 1926, by Soviet astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula.[19] The asteroid was named after female paratrooper Tamara Ivanova, who died at an early age.[2]

1084 Tamariwa
Discovery [1]
Discovered byS. Belyavskyj
Discovery siteSimeiz Obs.
Discovery date12 February 1926
Designations
(1084) Tamariwa
Named after
Tamara Ivanova [2]
(Soviet parachutist)
1926 CC · 1927 JB
1928 TA
main-belt · (middle) [3]
background [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc90.51 yr (33,058 days)
Aphelion3.0443 AU
Perihelion2.3327 AU
2.6885 AU
Eccentricity0.1323
4.41 yr (1,610 days)
122.39°
0° 13m 24.96s / day
Inclination3.8953°
186.88°
109.88°
Physical characteristics
Dimensions24.71±6.42 km[5]
26.476±0.237 km[6]
27.19±1.9 km[3][7]
28.87±0.44 km[8]
30.681±0.394 km[9]
6.153±0.001 h[10]
6.153 h[11]
6.19±0.01 h[12]
6.1949±0.0002 h[13]
6.195±0.001 h[14][15]
6.1961±0.0002 h[3][16]
6.22 h[17]
7.08 h[18]
0.0916±0.0083[9]
0.103±0.004[8]
0.1165±0.018[3][7]
0.132±0.034[6]
0.15±0.12[5]
C [3]
B–V = 0.770[1]
U–B = 0.270[1]
10.78[1][3][7][8][9][18] · 10.84[5]

    Orbit and classification

    Tamariwa is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the central asteroid belt at a distance of 2.3–3.0 AU once every 4 years and 5 months (1,610 days; semi-major axis of 2.69 AU). Its orbit has an eccentricity of 0.13 and an inclination of 4° with respect to the ecliptic.[1]

    The body's observation arc begins at Simeiz with its identification as 1927 JB in May 1927, more than 14 months after its official discovery observation.[19]

    Physical characteristics

    Tamariwa is a common carbonaceous C-type asteroid.[3]

    Rotation period

    Several rotational lightcurves of Tamariwa with a rotation period between 6.153 and 7.08 hours have been obtained from photometric observations since 1984.[10][11][12][13][14][15][16][17][18] Analysis of the best-rated lightcurve by French amateur astronomer Pierre Antonini gave a period of 6.1961 hours with a brightness amplitude of 0.42 magnitude (U=3).[3][16]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Tamariwa measures between 24.71 and 30.681 kilometers in diameter and its surface has an albedo between 0.0916 and 0.15.[5][6][7][8][9]

    The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1165 and a diameter of 27.19 kilometers based on an absolute magnitude of 10.78.[3]

    Naming

    This minor planet was named "Tamariwa" after Soviet parachutist Tamara Ivanova (1912–1936). The minor planets 1062 Ljuba and 1086 Nata were also named after Soviet female paratroopers Lyuba Berlin (1915–1936) and Nata Babushkina (1915–1936), respectively.[2]

    References
    1. "JPL Small-Body Database Browser: 1084 Tamariwa (1926 CC)" (2017-11-02 last obs.). Jet Propulsion Laboratory. Retrieved 9 November 2017.
    2. Schmadel, Lutz D. (2007). "(1084) Tamariwa". Dictionary of Minor Planet Names – (1084) Tamariwa. Springer Berlin Heidelberg. p. 92. doi:10.1007/978-3-540-29925-7_1085. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1084) Tamariwa". Asteroid Lightcurve Database (LCDB). Retrieved 9 November 2017.
    4. "Asteroid 1084 Tamariwa – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 28 October 2019.
    5. 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 9 November 2017.
    6. 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 9 November 2017.
    7. 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.
    8. 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)
    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. DeGraff, David R. (October 2017). "Stull Observatory Lightcurve Observations: 1998-2002". The Minor Planet Bulletin. 44 (4): 350–354. Bibcode:2017MPBu...44..350D. ISSN 1052-8091. Retrieved 9 November 2017.
    11. Degraff, D. R.; Robbins, A. M.; Gutermuth, R. A. (December 1998). "Rotation Curves for 13 Asteroids". American Astronomical Society. 30: 1390. Bibcode:1998AAS...193.9608D. Retrieved 9 November 2017.
    12. Ivarsen, Kevin; Willis, Sarah; Ingleby, Laura; Matthews, Dan; Simet, Melanie (June 2004). "CCD observations and period determination of fifteen minor planets". The Minor Planet Bulletin. 31 (2): 29–33. Bibcode:2004MPBu...31...29I. ISSN 1052-8091. Retrieved 9 November 2017.
    13. Sada, Pedro V. (June 2008). "Lightcurve Analysis of 1084 Tamariwa". The Minor Planet Bulletin. 35 (2): 50. Bibcode:2008MPBu...35...50S. ISSN 1052-8091. Retrieved 9 November 2017.
    14. Klinglesmith, Daniel A., III (January 2017). "Asteroid Photometry Results from Etscorn Observatory". The Minor Planet Bulletin. 44 (1): 69–72. Bibcode:2017MPBu...44...69K. ISSN 1052-8091. Retrieved 9 November 2017.
    15. Sada, Pedro V.; Navarro-Meza, Samuel; Reyes-Ruiz, Mauricio; Olguin, Lorenzo L.; Saucedo, Julio C.; Loera-Gonzalez, Pablo (April 2016). "Results of the 2015 Mexican Asteroid Photometry Campaign". The Minor Planet Bulletin. 43 (2): 154–156. Bibcode:2016MPBu...43..154S. ISSN 1052-8091. Retrieved 9 November 2017.
    16. Behrend, Raoul. "Asteroids and comets rotation curves – (1084) Tamariwa". Geneva Observatory. Retrieved 9 November 2017.
    17. Stecher, George; Ford, Lyle; Lorenzen, Kayla; Ulrich, Sarah (June 2008). "Photometric Measurements of 1084 Tamariwa at Hobbs Observatory". The Minor Planet Bulletin. 35 (2): 76–77. Bibcode:2008MPBu...35...76S. ISSN 1052-8091. Retrieved 9 November 2017.
    18. 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. Retrieved 9 November 2017.
    19. "1084 Tamariwa (1926 CC)". Minor Planet Center. Retrieved 9 November 2017.

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