1735 ITA

1735 ITA (prov. designation: 1948 RJ1) is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 62 kilometers in diameter. It was discovered on 10 September 1948, by Soviet–Russian astronomer Pelageya Shajn at the Simeiz Observatory located on the Crimean peninsula.[10] It was named for the Institute for Theoretical Astronomy (ITA) in what is now Saint Petersburg, Russia.[2]

1735 ITA
Shape model of ITA from its lightcurve
Discovery [1]
Discovered byP. F. Shajn
Discovery siteSimeiz Obs.
Discovery date10 September 1948
Designations
(1735) ITA
Named after
Institute for Theoretical Astronomy (USSR) [2]
1948 RJ1 · 1929 DA
1931 RF1 · 1934 BC
1935 GC · 1937 TN
1948 TB1 · 1948 TK
1951 DL · 1951 EY
1952 HN2 · 1952 JB
A907 GC
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc109.99 yr (40,173 days)
Aphelion3.5471 AU
Perihelion2.7277 AU
3.1374 AU
Eccentricity0.1306
5.56 yr (2,030 days)
198.34°
0° 10m 38.64s / day
Inclination15.608°
9.3378°
276.02°
Physical characteristics
Dimensions61.87±0.65 km[4]
61.93 km (derived)[3]
62.34±2.4 km[5]
66.09±1.13 km[6]
12.599±0.003 h[7]
12.6±0.1 h[7]
12.6103±0.0005 h[8]
0.0461 (derived)[3]
0.051±0.011[4]
0.070±0.003[6]
0.0790±0.007[5]
C [3]
9.4[5][6] · 9.90[4] · 10.0[1][3] · 10.37±0.78[9]

    Classification and orbit

    ITA orbits the Sun in the outer main-belt at a distance of 2.7–3.5 AU once every 5 years and 7 months (2,030 days). Its orbit has an eccentricity of 0.13 and an inclination of 16° with respect to the ecliptic.[1]

    It was first identified as A907 GC at Heidelberg Observatory in 1907, extending the body's observation arc by 41 years prior to its official discovery observation.[10]

    Physical characteristics

    ITA has been characterized as a carbonaceous C-type asteroid.[3]

    Lightcurves

    In November 2004, a rotational lightcurve was obtained by French amateur astronomer René Roy, gave a rotation period of 12.599 hours with a brightness variation of 0.27 magnitude (U=3-).[7] In March 2007, astronomers Laurent Brunetto and Jean-Gabriel Bosch derived a concurring period of 12.6 hours with and amplitude of 0.40 magnitude (U=2-)[7] A 2016-published light-curve from the Lowell Photometric Database gave a period of 12.6103 hours (U=n.a.).[8]

    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, ITA measures between 61.87 and 66.09 kilometers in diameter, and its surface has an albedo between 0.051 and 0.079.[4][5][6] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0461 and a diameter of 61.93 kilometers with an absolute magnitude of 10.0.[3]

    Naming

    This minor planet was named in 1979, on the occasion of the 60th anniversary of the founding of the USSR Academy of Sciences' Institute for Theoretical Astronomy (ITA), in what was then Leningrad.[2] The official naming citation was published by the Minor Planet Center on 1 June 1980 (M.P.C. 5357).[11]

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    References
    1. "JPL Small-Body Database Browser: 1735 ITA (1948 RJ1)" (2017-03-30 last obs.). Jet Propulsion Laboratory. Retrieved 7 June 2017.
    2. Schmadel, Lutz D. (2007). "(1735) Ita". Dictionary of Minor Planet Names – (1735) ITA. Springer Berlin Heidelberg. p. 138. doi:10.1007/978-3-540-29925-7_1736. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1735) ITA". Asteroid Lightcurve Database (LCDB). Retrieved 21 December 2016.
    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 21 December 2016.
    5. 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.
    6. 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)
    7. Behrend, Raoul. "Asteroids and comets rotation curves – (1735) ITA". Geneva Observatory. Retrieved 21 December 2016.
    8. Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M.; et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics. 586: 24. arXiv:1510.07422. Bibcode:2016A&A...586A.108H. doi:10.1051/0004-6361/201527441. Retrieved 21 December 2016.
    9. 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 21 December 2016.
    10. "1735 ITA (1948 RJ1)". Minor Planet Center. Retrieved 21 December 2016.
    11. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 21 December 2016.

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