1505 Koranna

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1505 Koranna
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date 21 April 1939
MPC designation (1505) Koranna
Named after
Koranna people[2]
(native South African people)
1939 HH · 1935 MD
1948 MB · 1958 UM
main-belt · (middle)
Eunomia[3] · background [4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 82.26 yr (30,045 days)
Aphelion 3.0150 AU
Perihelion 2.3037 AU
2.6593 AU
Eccentricity 0.1337
4.34 yr (1,584 days)
0° 13m 38.28s / day
Inclination 14.471°
Physical characteristics
Dimensions 20.46±0.76 km[5]
20.88±2.1 km[6]
21.00 km (derived)[3]
22.277±0.690 km[5]
22.83±0.88 km[7]
4.45±0.15 h[a]
4.451±0.001 h[8]
4.452±0.0011 h[9]
0.1209 (derived)[3]
S (assumed)[3]
11.197±0.002 (R)[9] · 11.30[1][3][5] · 11.47±0.63[10] · 11.60[6][7]

1505 Koranna, provisional designation 1939 HH, is a stony Eunomia asteroid from the central regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 21 April 1939, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg.[11] The asteroid was named for the native Koranna people of South Africa.[2]

Orbit and classification[edit]

Koranna is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4] The asteroid has also been classified as a member of the Eunomia family (502), a prominent family of stony S-type asteroid and the largest one in the intermediate main belt with more than 5,000 members.[3]

It orbits the Sun in the central main belt at a distance of 2.3–3.0 AU once every 4 years and 4 months (1,584 days). Its orbit has an eccentricity of 0.13 and an inclination of 14° with respect to the ecliptic.[1] The asteroid was first identified in June 1935 as 1935 MD at Simeiz Observatory on Crimea, where the body's observation arc begins the following month on July 1935.[11]

Physical characteristics[edit]

Koranna is an assumed stony S-type asteroid.[3]

Rotation period[edit]

Between 2088 and 2013, three rotational lightcurves of Koranna have been obtained from photometric observations. Lightcurve analysis gave a rotation period of 4.45, 4.451 and 4.452 hours with a brightness variation of 0.70, 0.55 and 0.53, respectively magnitude (U=2+/3/2).[8][9][a] A high brightness amplitude typically indicates that the body has an elongated, non-spherical shape.

Diameter and albedo[edit]

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, Koranna measures between 20.46 and 22.83 kilometers in diameter and its surface has an albedo between 0.082 and 0.127.[5][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1209 and a diameter of 21.00 kilometers based on an absolute magnitude of 11.3.[3]


This minor planet was named after the native Koranna people, better known as the Griqua people of South Africa. The tribe of wandering San people (Bushman) lives in the southern part of the Kalahari Desert in southern Africa.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 909).[12]


  1. ^ a b Garceran (2013) web: rotation period 4.45±0.15 hours with a brightness amplitude of 0.70 mag. Summary figures for (1505) Koranna at LCDB


  1. ^ a b c d "JPL Small-Body Database Browser: 1505 Koranna (1939 HH)" (2017-09-28 last obs.). Jet Propulsion Laboratory. Retrieved 18 October 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1505) Koranna. Springer Berlin Heidelberg. p. 120. ISBN 978-3-540-00238-3. Retrieved 18 October 2017. 
  3. ^ a b c d e f g h "LCDB Data for (1505) Koranna". Asteroid Lightcurve Database (LCDB). Retrieved 18 October 2017. 
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 18 October 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 18 October 2017. 
  6. ^ a b c Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 18 October 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 18 October 2017. 
  8. ^ a b Oliver, Robert Lemke; Shipley, Heath; Ditteon, Richard (October 2008). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2008 March". The Minor Planet Bulletin. 35 (4): 149–150. Bibcode:2008MPBu...35..149O. ISSN 1052-8091. Retrieved 18 October 2017. 
  9. ^ 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 18 October 2017. 
  10. ^ 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 18 October 2017. 
  11. ^ a b "1505 Koranna (1939 HH)". Minor Planet Center. Retrieved 18 October 2017. 
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 October 2017. 

External links[edit]