1856 Růžena

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1856 Růžena
Discovery [1]
Discovered by L. Chernykh
Discovery site Crimean Astrophysical Obs.
Discovery date 8 October 1969
MPC designation (1856) Růžena
Named after
Růžena Petrovicova
(Kleť Observatory)[2]
1969 TW1 · 1941 FP
1971 DL1
main-belt · (inner)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 47.47 yr (17,339 days)
Aphelion 2.4146 AU
Perihelion 2.0586 AU
2.2366 AU
Eccentricity 0.0796
3.34 yr (1,222 days)
0° 17m 40.92s / day
Inclination 4.7421°
Physical characteristics
Dimensions 6.620±0.252 km[3]
SMASS = S[1]

1856 Růžena, provisional designation 1969 TW1, is a stony asteroid from the inner regions of the asteroid belt, approximately 6.6 kilometers in diameter. It was discovered on 8 October 1969, by Russian astronomer Lyudmila Chernykh at Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[4] The asteroid was named after Růžena Petrovicova, staff member at Kleť Observatory.[2]

Orbit and classification[edit]

Růžena orbits the Sun in the inner main-belt at a distance of 2.1–2.4 AU once every 3 years and 4 months (1,222 days). Its orbit has an eccentricity of 0.08 and an inclination of 5° with respect to the ecliptic.[1] The asteroid was first identified as 1941 FP at the Finnish Iso-Heikkilä Observatory. The body's observation arc, however, starts with its official discovery observation at Nauchnyj in 1969.[4]

Physical characteristics[edit]

Růžena is bright S-type asteroid in the SMASS classification.[1]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Růžena measures 6.62 kilometers in diameter and its surface has an albedo of 0.335.[3] As of 2016, the body's rotation period and shape remain unknown.[1][5]


This asteroid was named in honor of Růžena Petrovicova, observer of comets and minor planets and staff member of the Kleť Observatory, located in what is now the Czech Republic.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 3825).[6]


  1. ^ a b c d e f g "JPL Small-Body Database Browser: 1856 Ruzena (1969 TW1)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1856) Ružena. Springer Berlin Heidelberg. p. 149. ISBN 978-3-540-00238-3. Retrieved 13 December 2016. 
  3. ^ a b c 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 13 December 2016. 
  4. ^ a b "1856 Ruzena (1969 TW1)". Minor Planet Center. Retrieved 13 December 2016. 
  5. ^ "LCDB Data for (1856) Růžena". Asteroid Lightcurve Database (LCDB). Retrieved 8 June 2017. 
  6. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 13 December 2016. 

External links[edit]