1391 Carelia

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
1391 Carelia
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Obs.
Discovery date 16 February 1936
MPC designation (1391) Carelia
Named after
(European region)[2]
1936 DA · 1949 MR
main-belt · (middle)
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 81.05 yr (29,605 days)
Aphelion 2.9675 AU
Perihelion 2.1278 AU
2.5476 AU
Eccentricity 0.1648
4.07 yr (1,485 days)
0° 14m 32.64s / day
Inclination 7.5939°
Physical characteristics
Dimensions 11.079±0.111 km[3]
11.46 km (calculated)[4]
11.570±0.108 km[5]
5.87822±0.00001 h[6]
0.20 (assumed)[4]
B–V = 0.897 [1]
U–B = 0.433 [1]
Tholen = S[1] · S[4][7]
11.23±0.42[7] · 12.07[1][4][5]

1391 Carelia, provisional designation 1936 DA, is a stony asteroid from the middle regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 16 February 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named for the Northeast European region of Karelia.[2][8]

Orbit and classification[edit]

Carelia is a stony asteroid that orbits the Sun at a distance of 2.1–3.0 AU once every 4 years and 1 month (1,485 days). Its orbit has an eccentricity of 0.16 and an inclination of 8° with respect to the ecliptic.[1] It was first observed at Heidelberg Observatory, extending the body's observation arc by 2 days prior to its official discovery observation at Turku.[8]

Physical characteristics[edit]

Rotation and pole[edit]

In 2016, a rotational lightcurve of Carelia was published using modeled photometric data from the Lowell Photometric Database (LPD). Lightcurve analysis gave a rotation period of 5.87822 hours (U=n.a.), as well as a spin axis of (21.0°, −79.0°) in ecliptic coordinates (λ, β).[6]

Spectral type[edit]

In the Tholen taxonomy, Carelia is a stony S-type asteroid, the most common type in the inner main-belt.[1]

Diameter and albedo[edit]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Carelia measures 11.079 and 11.570 kilometers in diameter and its surface has an albedo of 0.1972 and 0.214, respectively.[3][5] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 11.46 kilometers with an absolute magnitude of 12.07.[4]


This minor planet was named after the northeastern European region of Karelia, located between the Gulf of Finland and the Russian White Sea. Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 126).[2] Since the Winter War between the Soviet Union and Finland in 1939–40, most of the regions belongs now to Russia. A large part of Yrjö Väisälä's discoveries have names that are in some form or another related to that war about Karelia.


  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 1391 Carelia (1936 DA)" (2017-03-05 last obs.). Jet Propulsion Laboratory. Retrieved 3 April 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1391) Carelia. Springer Berlin Heidelberg. p. 112. ISBN 978-3-540-00238-3. Retrieved 3 April 2017. 
  3. ^ a b c 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:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 3 April 2017. 
  4. ^ a b c d e "LCDB Data for (1391) Carelia". Asteroid Lightcurve Database (LCDB). Retrieved 3 April 2017. 
  5. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 3 April 2017. 
  6. ^ a b Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909Freely accessible. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 3 April 2017. 
  7. ^ a b 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 3 April 2017. 
  8. ^ a b "1391 Carelia (1936 DA)". Minor Planet Center. Retrieved 3 April 2017. 

External links[edit]