1007 Pawlowia

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1007 Pawlowia
Discovery [1]
Discovered byV. Albitzkij
Discovery siteSimeiz Obs.
Discovery date5 October 1923
MPC designation(1007) Pawlowia
Named after
Ivan Pavlov[2]
(Russian physiologist)
1923 OX · 1934 FE
1954 UG1 · 1956 AK
main-belt · (middle)
background [3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc110.93 yr (40,516 days)
Aphelion3.0098 AU
Perihelion2.4048 AU
2.7073 AU
4.45 yr (1,627 days)
0° 13m 16.68s / day
Physical characteristics
Dimensions18.264±0.090 km[4]
19.263±0.062 km[5]
20.47±7.78 km[6]
20.83±5.50 km[7]
24.13±0.47 km[8]
32.03 km (calculated)[9]
8.23 h[10]
0.057 (assumed)[9]
SMASS = K[1][9]
11.20[6][9] · 11.3[1] · 11.39[7] · 11.50[5][8]

Pawlowia (minor planet designation: 1007 Pawlowia), provisional designation 1923 OX, is a background asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 5 October 1923, by Soviet astronomer Vladimir Albitsky at the Simeiz Observatory on the Crimean peninsula.[11] The asteroid was named after Russian physiologist and Nobelist Ivan Pavlov.[2]

Orbit and classification[edit]

Pawlowia is a non-family asteroid from the main belt's background population.[3] It orbits the Sun in the central asteroid belt at a distance of 2.4–3.0 AU once every 4 years and 5 months (1,627 days; semi-major axis of 2.71 AU). Its orbit has an eccentricity of 0.11 and an inclination of 3° with respect to the ecliptic.[1]

The asteroid was first imaged on a precovery taken at Lowell Observatory in December 1906. The body's observation arc begins at Simeiz on 30 October 1925, or 25 days after its official discovery observation (discovery record not listed).[11]

Physical characteristics[edit]

In the SMASS classification, Pawlowia is a K-type asteroid, which are common among members of the Eos family and known for their intermediate albedo.[1]

Rotation period[edit]

In September 2003, a tentative rotational lightcurve of Pawlowia was obtained from photometric observations by American Maurice Clark at the Bucknell and Rosemary Hill Observatory in Pennsylvania and Florida, respectively. Analysis of the essentially flat lightcurve gave a poorly rated rotation period of 8.23 hours with a brightness amplitude of at least 0.02 magnitude (U=1).[10] As of 2018, no secure period has been obtained.[9]

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, Pawlowia measures between 18.264 and 24.13 kilometers in diameter and its surface has an albedo between 0.080 and 0.145.[4][5][6][7][8]

The Collaborative Asteroid Lightcurve Link assumes an standard albedo for carbonaceous asteroids of 0.057 and consequently calculates a much larger diameter of 32.03 kilometers based on an absolute magnitude of 11.2.[9]


This minor planet was named after Russian biologist Ivan Pavlov (1849–1936), who was awarded the Nobel Prize in Physiology or Medicine in 1904 (see list of laureates). Pavlov is best known for his research on classical conditioning (Pavlov's dog).[2]

The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 96). The lunar crater Pavlov was also named in his honor.[2]


  1. ^ a b c d e f "JPL Small-Body Database Browser: 1007 Pawlowia (1923 OX)" (2017-11-24 last obs.). Jet Propulsion Laboratory. Retrieved 10 January 2018.
  2. ^ a b c d Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1007) Pawlowia. Springer Berlin Heidelberg. p. 87. ISBN 978-3-540-00238-3. Retrieved 10 January 2018.
  3. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 10 January 2018.
  4. ^ 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" (PDF). The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 10 January 2018.
  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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 10 January 2018.
  6. ^ 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:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 10 January 2018.
  7. ^ 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:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 10 January 2018.
  8. ^ 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 10 January 2018.
  9. ^ a b c d e f "LCDB Data for (1007) Pawlowia". Asteroid Lightcurve Database (LCDB). Retrieved 10 January 2018.
  10. ^ a b Clark, Maurice (September 2006). "Lightcurve results for 383 Janina, 899 Jokaste, 1825 Klare, 2525 O'Steen 5064 Tanchozuru, and (17939) 1999 HH8". The Minor Planet Bulletin. 33 (3): 53–56. Bibcode:2006MPBu...33...53C. ISSN 1052-8091. Retrieved 10 January 2018.
  11. ^ a b "1007 Pawlowia (1923 OX)". Minor Planet Center. Retrieved 10 January 2018.

External links[edit]