1202 Marina

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1202 Marina
Discovery [1]
Discovered byG. Neujmin
Discovery siteSimeiz Obs.
Discovery date13 September 1931
MPC designation(1202) Marina
Named after
Marina Lavrova–Berg [2]
(Soviet scientist)
1931 RL · 1931 TH
1980 BL3 · A924 WG
A924 YA
main-belt · (outer)[1]
Hilda[3][4] · background [5]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc92.99 yr (33,964 days)
Aphelion4.6621 AU
Perihelion3.3339 AU
3.9980 AU
7.99 yr (2,920 days)
0° 7m 23.88s / day
Jupiter MOID0.7908 AU
Physical characteristics
Dimensions54.93±2.6 km[6]
55.07 km (derived)[4]
63.76±1.28 km[7]
9.45 h[8]
9.571±0.0042 h[9]
0.045 (derived)[4]
Tholen = P[4]
9.756±0.001 (R)[9] · 10.0[1] · 10.09±0.23[10] · 10.28[4][8] · 10.60[6][7]

1202 Marina, provisional designation 1931 RL, is a primitive Hildian background asteroid from the outermost regions of the asteroid belt, approximately 55 kilometers in diameter. It was discovered by Grigory Neujmin at the Simeiz Observatory in 1931, and later named in honor of Marina Lavrova–Berg, a scientific collaborator at Pulkovo Observatory, who died at an early age during WWII.[3]


Marina was discovered on 13 September 1931, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[3] Two nights later, it was independently discovered by German astronomer Karl Reinmuth at the Heidelberg Observatory on 15 September 1931.[2] The Minor Planet Center only recognizes the first discoverer.[3]

The asteroid was first observed as A924 WG at Heidelberg Observatory in November 1924. The body's observation arc also begins at Heidelberg in January 1925, more than 6 years prior to its official discovery observation at Simeiz.[3]

Orbit and classification[edit]

Marina is a non-family background asteroid of the Hilda group, located in the outermost region of the main-belt and in an 2:1 resonance with the giant planet Jupiter.[5][4] It orbits the Sun at a distance of 3.3–4.7 AU once every 7 years and 12 months (2,920 days; semi-major axis of 4.00 AU). Its orbit has an eccentricity of 0.17 and an inclination of 3° with respect to the ecliptic.[1]

Physical characteristics[edit]

In the Tholen classification, Marina is a primitive P-type asteroid.[4]

Rotation period[edit]

In the 1990s, a rotational lightcurve of Marina was obtained from a survey of Hildian asteroids by European astronomers. Lightcurve analysis gave a well-defined rotation period of 9.45 hours with a brightness variation of 0.29 magnitude (U=3).[8] In October 2010, photometric observations in the R-band by astronomers at the Palomar Transient Factory in California gave a similar period of 9.571 hours and an amplitude of 0.09 (U=1).[9]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, Marina measures 54.93 and 63.76 kilometers in diameter and its surface has a low albedo of 0.0337 and 0.026, respectively.[6][7]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.045 and a diameter of 55.07 kilometers based on an absolute magnitude of 10.28.[4]


This minor planet was named after Marina Davydovna Lavrova–Berg (1898–1943), a scientific collaborator who worked at the Pulkovo Observatory near Saint Petersburg during 1931–1942.[2]


  1. ^ a b c d e "JPL Small-Body Database Browser: 1202 Marina (1931 RL)" (2017-11-25 last obs.). Jet Propulsion Laboratory. Retrieved 5 January 2018.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1202) Marina". Dictionary of Minor Planet Names – (1202) Marina. Springer Berlin Heidelberg. p. 100. doi:10.1007/978-3-540-29925-7_1203. ISBN 978-3-540-00238-3.
  3. ^ a b c d e "1202 Marina (1931 RL)". Minor Planet Center. Retrieved 5 January 2018.
  4. ^ a b c d e f g h "LCDB Data for (1202) Marina". Asteroid Lightcurve Database (LCDB). Retrieved 5 January 2018.
  5. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 5 January 2018.
  6. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Archived from the original on 2016-06-03. Retrieved 5 January 2018.
  7. ^ a b c d 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 5 January 2018.
  8. ^ a b c Dahlgren, M.; Lahulla, J. F.; Lagerkvist, C.-I.; Lagerros, J.; Mottola, S.; Erikson, A.; et al. (June 1998). "A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids". Icarus. 133 (2): 247–285. Bibcode:1998Icar..133..247D. doi:10.1006/icar.1998.5919. Retrieved 5 January 2018.
  9. ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 5 January 2018.
  10. ^ 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 5 January 2018.

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