1097 Vicia

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1097 Vicia
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 11 August 1928
MPC designation (1097) Vicia
Named after
Vicia (flowering plant)[2]
1928 PC · 1941 SO2
1958 PF · 1978 BG
A907 VF
main-belt · (middle)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 109.40 yr (39,958 days)
Aphelion 3.4186 AU
Perihelion 1.8697 AU
2.6441 AU
Eccentricity 0.2929
4.30 yr (1,570 days)
0° 13m 45.12s / day
Inclination 1.5332°
Physical characteristics
Dimensions 19.63±6.08 km[4]
21.02 km (derived)[3]
23.110±0.118 km[5]
23.95±1.04 km[6]
24.93±0.54 km[7]
26.55±0.35 km[5]
26.5±0.1 h[8]
0.0695 (derived)[3]
11.70[7] · 11.90[3][4][5] · 12.0[1] · 12.14±0.26[9] · 12.20[6]

1097 Vicia, provisional designation 1928 PC, is an asteroid from the central regions of the asteroid belt, approximately 23 kilometers in diameter. Discovered by Karl Reinmuth at the Heidelberg Observatory in 1928, the asteroid was later named after the flowering plant Vicia, commonly known as vetches.


Vicia was discovered by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany on 11 August 1928.[10] On 15 and 22 August, the asteroid was independently discovered by Soviet astronomer Pelageya Shajn at Simeiz Observatory on the Crimean peninsula, and by English astronomer Harry Edwin Wood at the Johannesburg Observatory in South Africa, respectively.[2] However, the Minor Planet Center only recognizes the first discoverer.[10]

The asteroid was first identified as A907 VF at Heidelberg in May 1907. The body's observation arc begins at Heidelberg in August 1928, six nights after its official discovery observation.[10]

Orbit and classification[edit]

Vicia is a non-family asteroid from the main belt's background population. It orbits the Sun in the central main belt at a distance of 1.9–3.4 AU once every 4 years and 4 months (1,570 days). Its orbit has an eccentricity of 0.29 and an inclination of 2° with respect to the ecliptic.[1]

Physical characteristics[edit]

Vicia spectral type has not been determined. Asteroids in the central main belt with a semi-major axis between 2.6 and 2.7 AU, are located in a transitional region where both stony and carbonaceous asteroids are frequent and generic assumptions are difficult.[3][a]

Rotation period[edit]

In November 2010, a rotational lightcurve of Vicia was obtained from photometric observations by Gordon Gartrelle at the University of North Dakota (730) and at the Badlands Observatory in North Dakota, United States. Analysis of the fragmentary lightcurve gave a rotation period of 26.5 hours with a brightness variation of 0.08 magnitude, indicative for a spherical rather than irregular and elongated shape (U=1).[8] As of 2017, however, no other lightcurve has been obtained and Vicia's rotation period has not yet been secured.[3]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Vicia measures between 19.63 and 26.55 kilometers in diameter and its surface has an albedo between 0.031 and 0.060.[4][5][6][7]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0695 and a diameter of 21.02 kilometers based on an absolute magnitude of 11.9.[3]


This minor planet was named after the flowering plant Vicia, member of the Fabaceae (legume family). It is commonly known as vetches. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 103).[2]

Reinmuth's flowers[edit]

Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between (1009) and (1200). This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants).[11]


  1. ^ For central-belt asteroids with 2.6 < a < 2.7, the LCDB assumes an "S/C" class with an albedo of 0.10, a compromise between the stony (p=0.20) and carbonaceous (p=0.057) asteroids


  1. ^ a b c d "JPL Small-Body Database Browser: 1097 Vicia (1928 PC)" (2017-03-30 last obs.). Jet Propulsion Laboratory. Retrieved 19 September 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1097) Vicia. Springer Berlin Heidelberg. p. 93. ISBN 978-3-540-00238-3. Retrieved 19 September 2017. 
  3. ^ a b c d e f g h "LCDB Data for (1097) Vicia". Asteroid Lightcurve Database (LCDB). Retrieved 19 September 2017. 
  4. ^ a b c d 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:1509.02522Freely accessible. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 19 September 2017. 
  5. ^ a b c d e f 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 19 September 2017. 
  6. ^ a b c d 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:1606.08923Freely accessible. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 19 September 2017. 
  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 19 September 2017. 
  8. ^ a b Gartrelle, Gordon M. (April 2012). "Lightcurve Results for Eleven Asteroids". The Minor Planet Bulletin. 39 (2): 40%–46. Bibcode:2012MPBu...39...40G. ISSN 1052-8091. Retrieved 19 September 2017. 
  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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 19 September 2017. 
  10. ^ a b c "1097 Vicia (1928 PC)". Minor Planet Center. Retrieved 19 September 2017. 
  11. ^ Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1054) Forsytia. Springer Berlin Heidelberg. p. 90. ISBN 978-3-540-00238-3. Retrieved 19 September 2017. 

External links[edit]