(5648) 1990 VU1
| Discovery [1] | |
|---|---|
| Discovered by |
K. Endate K. Watanabe |
| Discovery site | Kitami Obs. |
| Discovery date | 11 November 1990 |
| Designations | |
| MPC designation | (5648) 1990 VU1 |
| 1990 VU1 | |
|
Jupiter trojan [1][2] Trojan [3] · background [4] | |
| Orbital characteristics [2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 67.94 yr (24,816 d) |
| Aphelion | 6.0024 AU |
| Perihelion | 4.3016 AU |
| 5.1520 AU | |
| Eccentricity | 0.1651 |
| 11.69 yr (4,271 d) | |
| 178.01° | |
| 0° 5m 3.48s / day | |
| Inclination | 22.693° |
| 71.048° | |
| 268.85° | |
| Jupiter MOID | 0.0521 AU |
| TJupiter | 2.8210 |
| Physical characteristics | |
Mean diameter |
59.30±1.35 km[5] 63.91 km (calculated)[6] |
| 37.56±0.05 h[7] | |
|
0.057 (assumed)[6] 0.073±0.015[5] | |
|
D (S3OS2)[8] B–V = 0.730±0.060[9] V–R = 0.480±0.040[9] V–I = 0.900±0.032[6] | |
|
9.6[5] 9.7[1][2][6] | |
|
| |
(5648) 1990 VU1, provisional designation 1990 VU1, is a Jupiter trojan from the Trojan camp, approximately 60 kilometers (37 miles) in diameter. It was discovered on 11 November 1990, by Japanese amateur astronomers Kin Endate and Kazuro Watanabe at the Kitami Observatory on the northern island of Hokkaidō, Japan.[1] The dark D-type asteroid belongs to the 70 largest Jupiter trojans and has a long rotation period of 37.6 hours.[6] It has not been named since its numbering in September 1993.[10]
Orbit and classification
1990 VU1 is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's L5 Lagrangian point, 60° behind its orbit . It is also a non-family asteroid of the Jovian background population.[4]
It orbits the Sun at a distance of 4.3–6.0 AU once every 11 years and 8 months (4,271 days; semi-major axis of 5.15 AU). Its orbit has an eccentricity of 0.17 and an inclination of 23° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at the Palomar Observatory in June 1950, more than 40 years prior to its official discovery observation.[1]
Physical characteristics
In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), 1990 VU1 is a dark D-type asteroid, the dominant spectral type among the larger Jupiter trojans.[8][11] It has a typical V–I color index of 0.90.[6]
Rotation period
In February 2005, Federico Manzini at the Sozzago Astronomical Station (A12) in Italy obtained the first rotational lightcurve of 1990 VU1. It gave a tentative rotation period of 16.04 hours with a brightness amplitude of 0.22 based on three nights of observation magnitude (U=2).[6][12]
In June 2006, photometric observations over eight nights were made by Italian astronomer Stefano Mottola at the Calar Alto Observatory in Spain. Lightcurve analysis gave a rotation period of 37.56±0.05 hours with a brightness amplitude of 0.20 magnitude (U=3-), superseding Manzini's previous result.[7] A concurring period of 37.6083 hours with an amplitude of 0.19 magnitude was measured by astronomers at the Palomar Transient Factory in October 2013 (U=2).[13] While not being a slow rotator, its period is significantly longer than that of most larger Jupiter trojans (see list below).
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 1990 VU1 measures 59.30 kilometers in diameter and its surface has an albedo 0.073,[5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 63.91 kilometers based on an absolute magnitude of 9.7.[6] A diameter measurement for this asteroid has not been previously published by Akari and IRAS.[lower-alpha 1]
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Numbering and naming
This minor planet was numbered on 1 September 1993 (M.P.C. 22480).[10] As of 2018, it has not been named.[1]
Notes
- ↑ No diameter given in the Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey, see AcuA catalog p. 153 and in the IRAS Minor Planet Survey V6.0 (SIMPS), see IRAS-A-FPA-3-RDR-IMPS-V6.0 at NASA's Planetary Data System.
References
- 1 2 3 4 5 6 "5648 (1990 VU1)". Minor Planet Center. Retrieved 17 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 5648 (1990 VU1)" (2018-05-25 last obs.). Jet Propulsion Laboratory. Retrieved 17 June 2018.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. Retrieved 17 June 2018.
- 1 2 "Asteroid (5648) 1990 VU1 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 17 June 2018.
- 1 2 3 4 Grav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 17 June 2018. (online catalog)
- 1 2 3 4 5 6 7 8 "LCDB Data for (5648)". Asteroid Lightcurve Database (LCDB). Retrieved 17 June 2018.
- 1 2 Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; et al. (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 32. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170.
- 1 2 Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S3OS2: the visible spectroscopic survey of 820 asteroids" (PDF). Icarus. 172 (1): 179–220. Bibcode:2004Icar..172..179L. doi:10.1016/j.icarus.2004.06.006. Retrieved 17 June 2018.
- 1 2 Chatelain, Joseph P.; Henry, Todd J.; French, Linda M.; Winters, Jennifer G.; Trilling, David E. (June 2016). "Photometric colors of the brightest members of the Jupiter L5 Trojan cloud". Icarus. 271: 158–169. Bibcode:2016Icar..271..158C. doi:10.1016/j.icarus.2016.01.026. Retrieved 9 June 2018.
- 1 2 "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 June 2018.
- ↑ "Asteroid (5648) 1990 VU1". Small Bodies Data Ferret. Retrieved 17 June 2018.
- ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (5648)". Geneva Observatory. Retrieved 29 June 2016.
- ↑ 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.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- (5648) 1990 VU1 at AstDyS-2, Asteroids—Dynamic Site
- (5648) 1990 VU1 at the JPL Small-Body Database
