8034 Akka
| Discovery [1] | |
|---|---|
| Discovered by |
C. Shoemaker E. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 3 June 1992 |
| Designations | |
| MPC designation | 8034 Akka |
Named after | Akka (Finnish mythology)[2] |
| 1992 LR | |
| Amor · NEO [1] | |
| Orbital characteristics [1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 23.78 yr (8,687 days) |
| Aphelion | 2.5786 AU |
| Perihelion | 1.0817 AU |
| 1.8301 AU | |
| Eccentricity | 0.4090 |
| 2.48 yr (904 days) | |
| 330.28° | |
| 0° 23m 53.16s / day | |
| Inclination | 2.0241° |
| 232.87° | |
| 68.166° | |
| Earth MOID | 0.0747 AU |
| Physical characteristics | |
| Dimensions |
0.700 km (derived)[3] 0.800 km[4] |
|
3.6377 h[5] 7.283±0.004 h[6] | |
| 0.20 (assumed)[3] | |
| S [3] | |
| 17.9[1] · 18.14[5] · 18.148±0.11[3][7] · 18.15±0.11[6] | |
|
| |
8034 Akka, provisional designation 1992 LR, is a stony and eccentric asteroid, classified as near-Earth object of the Apollo group, approximately 0.7 kilometers in diameter. It was discovered by American astronomer couple Carolyn and Eugene Shoemaker at the U.S. Palomar Observatory, California, on 3 June 1992, as the asteroid neared a close approach to Earth the following month at 12.1 million kilometers or 31.5 lunar distances.[8][9]
The S-type asteroid orbits the Sun at a distance of 1.1–2.6 AU once every 2 years and 6 months (904 days). Its orbit has an eccentricity of 0.41 and an inclination of 2° with respect to the ecliptic.[1] The first observation was made at Siding Spring Observatory in May 1992, extending the asteroid's observation arc by just two weeks prior to its discovery.[8]
With an Earth minimum orbit intersection distance of 0.0738 AU (11,000,000 km), it is only slightly above the threshold-limit of 0.05 AU, or about 19.5 lunar distances, defined for potentially hazardous asteroids.[1] The asteroid frequently makes close approaches to Earth and Mars. Its closest recorded approach to Earth and Mars is 0.081 AU on 29 July 1992 and 0.061 AU on 26 April 1982, respectively. It will make its closest approach to another planet when it comes within 0.044 AU of Mars on 6 April 2171.[9]
A rotational light-curve was obtained from photoelectic observation made by Polish astronomer Wiesław Wiśniewski of the University of Arizona in August 1992. The ambiguous light-curve gave a rotation period of 7.283±0.004 hours with a brightness variation of 0.46 in magnitude (U=2).[6] Alternatively, the body rotates once every 3.6377 hours (or half the previous period) with an amplitude of 0.52, as determined by Czech astronomer Petr Pravec (U=2).[5] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 0.7 kilometers.[3]
The minor planet was named after Akka from Finnish mythology. She is the Earth's mother and the goddess of harvest and personifies love, agriculture and femininity. Akka is the wife of the principal sky deity Ukko, after whom the minor planet 2020 Ukko is named.[2] Naming citation was published on 24 July 2002 (M.P.C. 46101).[10]
References
- 1 2 3 4 5 6 "JPL Small-Body Database Browser: 8034 Akka (1992 LR)" (2016-03-03 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (8034) Akka. Springer Berlin Heidelberg. p. 628. ISBN 978-3-540-00238-3. Retrieved 1 February 2016.
- 1 2 3 4 5 "LCDB Data for (8034) Akka". Asteroid Lightcurve Database (LCDB). Retrieved 30 May 2016.
- ↑ "(8034) Akka". NEODyS. University of Pisa. Retrieved 24 November 2015.
- 1 2 3 Pravec, Petr; Wolf, Marek; Sarounová, Lenka (November 1998). "Lightcurves of 26 Near-Earth Asteroids". Icarus. 136 (1): 124–153. Bibcode:1998Icar..136..124P. doi:10.1006/icar.1998.5993. Retrieved 1 February 2016.
- 1 2 3 Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved 1 February 2016.
- ↑ Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved 30 May 2016.
- 1 2 "8034 Akka (1992 LR)". Minor Planet Center. Retrieved 1 February 2016.
- 1 2 "Close-Approach Data for 8034 Akka (1992 LR)". Jet Propulsion Laboratory. Retrieved 30 May 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 30 May 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 8034 Akka at the JPL Small-Body Database
