4904 Makio
| Discovery [1] | |
|---|---|
| Discovered by | Y. Mizuno T. Furuta |
| Discovery site | Kani Obs. (403) |
| Discovery date | 21 November 1989 |
| Designations | |
| 4904 Makio | |
Named after | Makio Akiyama (astronomer)[2] |
| 1989 WZ · 1974 TB 1974 WC · 1980 KF2 | |
| main-belt · (inner) [3][4] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 41.61 yr (15,199 days) |
| Aphelion | 2.6991 AU |
| Perihelion | 2.0798 AU |
| 2.3894 AU | |
| Eccentricity | 0.1296 |
| 3.69 yr (1,349 days) | |
| 22.343° | |
| 0° 16m 0.48s / day | |
| Inclination | 10.117° |
| 228.95° | |
| 266.81° | |
| Physical characteristics | |
| Dimensions | 6.992±0.044 km[5] 9.40 km (calculated)[4] |
| 7.830±0.003 h[6] | |
| 0.20 (assumed)[4] 0.3295±0.0326[5] | |
| S [4] | |
| 12.5[1][4] 12.6[5] 12.70±0.57[7] | |
4904 Makio, provisional designation 1989 WZ, is a stony asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered by Japanese astronomers Yoshikane Mizuno and Toshimasa Furuta at Kani Observatory (403) on 21 November 1989.[3]
The S-type asteroid orbits the Sun at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,349 days). Its orbit has an eccentricity of 0.13 and an inclination of 10° with respect to the ecliptic.[1] The first observation was taken at Cerro El Roble Observatory in 1974, extending the asteroid's observation arc by 15 years prior to its discovery.[3]
A rotational light-curve for this asteroid was obtained from photometric observations made by Julian Oey at the Australian Kingsgrove Observatory in March 2009. The light-curve gave it a rotation period of 7.830±0.003 hours with a small brightness variation of 0.08 magnitude, indicative of a spheroidal shape (U=2).[6]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 7.0 kilometers in diameter and its surface has an albedo of 0.33,[5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.4 kilometers, based on an absolute magnitude of 12.5.[4]
The minor planet was named after Japanese astronomer Makio Akiyama (b. 1950), an observer and discoverer of minor planets himself at the Susono Observatory (886).[2] Naming citation was published on 5 March 1996 (M.P.C. 26763).[8]
References
- ^ a b c d "JPL Small-Body Database Browser: 4904 Makio (1989 WZ)" (2016-05-22 last obs.). Jet Propulsion Laboratory. Retrieved 18 November 2016.
- ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (4904) Makio. Springer Berlin Heidelberg. p. 423. ISBN 978-3-540-00238-3. Retrieved 18 November 2016.
- ^ a b c "4904 Makio (1989 WZ)". Minor Planet Center. Retrieved 18 November 2016.
- ^ a b c d e f "LCDB Data for (4904) Makio". Asteroid Lightcurve Database (LCDB). Retrieved 18 November 2016.
- ^ 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 18 November 2016.
- ^ a b Oey, Julian (October 2010). "Light Curve Analysis of Asteroids from Leura and Kingsgrove Observatory in the First Half of 2009". The Minor Planet Bulletin. 37 (4): 135–136. Bibcode:2010MPBu...37..135O. ISSN 1052-8091. Retrieved 18 November 2016.
- ^ 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 18 November 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 November 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 (1)-(5000) – Minor Planet Center
- 4904 Makio at the JPL Small-Body Database
