1096 Reunerta, provisional designation 1928 OB, is an asteroid from the background population of the asteroid belt's central region, approximately 40 kilometers in diameter. It was discovered on 21 July 1928, by astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa.[17] The asteroid was named after South African engineer Theodore Reunert, supporter of the observatory and friend of the discoverer.[2]

1096 Reunerta
Discovery [1]
Discovered byH. E. Wood
Discovery siteJohannesburg Obs.
Discovery date21 July 1928
MPC designation(1096) Reunerta
Named after
Theodore Reunert
(South African engineer)[2]
1928 OB
main-belt · (middle)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc88.43 yr (32,300 days)
Aphelion3.1055 AU
Perihelion2.0967 AU
2.6011 AU
4.20 yr (1,532 days)
0° 14m 5.64s / day
Physical characteristics
Dimensions35.95±14.97 km[5]
38.51±11.33 km[6]
42.333±0.232 km[7]
43.30±0.75 km[8]
45.65 km (derived)[3]
45.736±0.577 km[9]
45.83±2.7 km[10]
46.34±0.76 km[11]
13.02±0.01 h[12]
13.030±0.006 h[13]
13.036±0.002 h[14]
13.036±0.0073 h[15]
0.0445 (derived)[3]
C [3]
10.30[8][9][10] · 10.506±0.002 (R)[15] · 10.70[1][3][5][11] · 10.72[6] · 11.30±0.88[16]

Orbit and classificationEdit

Reunerta is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the central main-belt at a distance of 2.1–3.1 AU once every 4 years and 2 months (1,532 days). Its orbit has an eccentricity of 0.19 and an inclination of 9° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Johannesburg.[17]

Physical characteristicsEdit

Reunerta is an assumed carbonaceous C-type asteroid.[3]

Rotation periodEdit

Since 2000, several rotational lightcurves of Reunerta were obtained from photometric observations by Robert Stephens, Roberto Crippa and Federico Manzini, as well as by astronomers at the Palomar Transient Factory in California. Analysis of the best-rated lightcurve gave a rotation period of 13.036 hours with a brightness amplitude of xyz magnitude (U=2/2/2/3).[12][13][14][15]

Diameter and albedoEdit

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Reunerta measures between 35.95 and 46.34 kilometers in diameter and its surface has an albedo between 0.043 and 0.072.[5][6][7][8][9][10][11]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0445 and a diameter of 45.65 kilometers based on an absolute magnitude of 10.7.[3]


This minor planet was named after Theodore Reunert, a mining engineer in South Africa. He was also a member of the South African Association for the Advancement of Science, supporter of the discovering Union Observatory and a friend of the discoverer, who was the director of the discovering Union Observatory at the time.[2][18] The observatory's Reunert Telescope, a 9-inch (23 cm) telescope, was also named in his honor in 1927.[19] The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 103).[2]


  1. ^ a b c d "JPL Small-Body Database Browser: 1096 Reunerta (1928 OB)" (2016-12-26 last obs.). Jet Propulsion Laboratory. Retrieved 25 September 2017.
  2. ^ a b c d Schmadel, Lutz D. (2007). "(1096) Reunerta". Dictionary of Minor Planet Names – (1096) Reunerta. Springer Berlin Heidelberg. p. 93. doi:10.1007/978-3-540-29925-7_1097. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g "LCDB Data for (1096) Reunerta". Asteroid Lightcurve Database (LCDB). Retrieved 25 September 2017.
  4. ^ a b "Asteroid 1096 Reunerta – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 31 October 2019.
  5. ^ 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 25 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:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 25 September 2017.
  7. ^ a b 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:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 25 September 2017.
  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 17 October 2019. (online, AcuA catalog p. 153)
  9. ^ 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". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
  10. ^ 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. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
  11. ^ a b c d 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 25 September 2017.
  12. ^ a b Stephens, R. D. (September 2001). "Rotational Periods and Lightcurves of 1096 Reunerta and 1000 Piazzia". The Minor Planet Bulletin. 28: 56. Bibcode:2001MPBu...28...56S. Retrieved 25 September 2017.
  13. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1096) Reunerta". Geneva Observatory. Retrieved 25 September 2017.
  14. ^ a b Stephens, Robert D. (December 2007). "Photometry from GMARS and Santana Observatories - April to June 2007". The Minor Planet Bulletin. 34 (4): 102–103. Bibcode:2007MPBu...34..102S. ISSN 1052-8091. Retrieved 25 September 2017.
  15. ^ 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 25 September 2017.
  16. ^ 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 25 September 2017.
  17. ^ a b "1096 Reunerta (1928 OB)". Minor Planet Center. Retrieved 25 September 2017.
  18. ^ "Republic Observatory (known as Johannesburg or Union Observatory)". Astronomical Society of Southern Africa. Retrieved 29 December 2016.
  19. ^ "Reunert Telescope". Astronomical Society of Southern Africa. Retrieved 29 December 2016.

External linksEdit