4063 Euforbo
| Discovery [1] | |
|---|---|
| Discovered by | San Vittore Obs. |
| Discovery site | San Vittore Obs. |
| Discovery date | 1 February 1989 |
| Designations | |
| MPC designation | (4063) Euforbo |
| Pronunciation | /juːˈfɔːrboʊ/ yoo-FOR-boh |
Named after |
Euphorbus (Euforbo) [1] (Greek mythology) |
|
1989 CG2 · 1943 EV 1951 XJ · 1970 LC 1974 VO2 | |
|
Jupiter trojan [1][2][3] Greek [4][5] · background [5] | |
| Orbital characteristics [2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 75.21 yr (27,471 d) |
| Aphelion | 5.7958 AU |
| Perihelion | 4.5747 AU |
| 5.1852 AU | |
| Eccentricity | 0.1177 |
| 11.81 yr (4,313 d) | |
| 224.59° | |
| 0° 5m 0.6s / day | |
| Inclination | 18.941° |
| 113.51° | |
| 318.44° | |
| Jupiter MOID | 0.4441 AU |
| TJupiter | 2.8790 |
| Physical characteristics | |
Mean diameter |
95.62±0.68 km[6] 102.35 km (derived)[3] 102.46±4.1 km[7] 106.38±4.56 km[8] |
|
8.801±0.008 h[9][lower-alpha 1] 8.84±0.01 h[10][lower-alpha 1] 8.841±0.025 h[11] 8.845±0.0050 h[12] 8.846±0.001 h[13] 10.4±0.6 h[14] | |
|
0.0558 (derived)[3] 0.057±0.005[8] 0.0611±0.005[7] 0.070±0.005[6] | |
|
C (assumed)[3] D (S3OS2-TH)[15] D (S3OS2-BB)[15] V–I = 0.950±0.014[3] | |
|
8.489±0.001[12] 8.60[6][8] 8.7[1][2][3] 8.76±0.18[16] | |
|
| |
4063 Euforbo, provisional designation 1989 CG2, is a large Jupiter trojan from the Greek camp, approximately 100 kilometers (62 miles) in diameter. It was discovered on 1 February 1989, by Italian astronomers at the San Vittore Observatory near Bologna, Italy.[1] The dark D-type asteroid is one of the 25 largest Jupiter trojans and has a rotation period of 8.8 hours.[3] It was named after Euphorbus (Euforbo) from Greek mythology.[1]
Orbit and classification
Euforbo is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.[5][17]
It orbits the Sun at a distance of 4.6–5.8 AU once every 11 years and 10 months (4,313 days; semi-major axis of 5.19 AU). Its orbit has an eccentricity of 0.12 and an inclination of 19° with respect to the ecliptic.[2]
The body's observation arc begins with its first observation as 1943 EV at Turku Observatory in March 1943, nearly 46 years prior to its official discovery observation at Bologna.[1]
Physical characteristics
In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Euforbo is a dark D-type asteroid.[15][17] It is also an assumed, carbonaceous C-type asteroid.[3]
Rotation period
Since 1992, several rotational lightcurve of Euforbo have been obtained from photometric observations by Stefano Mottola, Robert Stephens, René Roy and astronomers at the Palomar Transient Factory (U=3).[9][10][11][12][14][lower-alpha 1] In November 2010, the best-rated lightcurve by James Brinsfield at the Via Capote Observatory (G69), California, gave a rotation period of 8.846 hours with a brightness amplitude of 0.19 magnitude (U=3).[3][13]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Euforbo measures between 95.62 and 106.38 kilometers in diameter and its surface has an albedo between 0.057 and 0.070.[6][7][8]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0558 and a diameter of 102.35 kilometers based on an absolute magnitude of 8.7.[3]
100+ largest Jupiter trojans
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Naming
This minor planet was named from Greek mythology after Euphorbus (Euforbo), the Greek hero who wounded Patroclus in the breast before being killed by Hektor.[1] The official naming citation was published by the Minor Planet Center on 19 January 1992 (M.P.C. 19347).[18]
Notes
References
- 1 2 3 4 5 6 7 8 "4063 Euforbo (1989 CG2)". Minor Planet Center. Retrieved 6 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 4063 Euforbo (1989 CG2)" (2018-05-25 last obs.). Jet Propulsion Laboratory. Retrieved 6 June 2018.
- 1 2 3 4 5 6 7 8 9 10 "LCDB Data for (4063) Euforbo". Asteroid Lightcurve Database (LCDB). Retrieved 6 June 2018.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. Retrieved 6 June 2018.
- 1 2 3 "Asteroid (4063) Euforbo – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 5 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" (PDF). The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 9 June 2018. (online catalog)
- 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 15 June 2018.
- 1 2 3 4 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 15 June 2018. (online, AcuA catalog p. 153)
- 1 2 Stephens, Robert D.; Coley, Daniel R.; Warner, Brian D.; French, Linda, M. (October 2016). "Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies". The Minor Planet Bulletin. 43 (4): 323–331. Bibcode:2016MPBu...43..323S. ISSN 1052-8091. Retrieved 6 June 2018.
- 1 2 Stephens, Robert D.; Coley, Daniel, R.; French, Linda M. (January 2016). "Large L5 Jovian Trojan Asteroid Lightcurves from the Center for Solar System Studies". The Minor Planet Bulletin. 43 (1): 15–22. Bibcode:2016MPBu...43...15S. ISSN 1052-8091. Retrieved 6 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. Retrieved 6 June 2018.
- 1 2 3 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" (PDF). The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 6 June 2018.
- 1 2 Brinsfield, J. W. (April 2011). "Asteroid Lightcurve Analysis at the Via Capote Observatory: 4th Quarter 2010". The Minor Planet Bulletin. 38 (2): 73–74. Bibcode:2011MPBu...38...73B. ISSN 1052-8091. Retrieved 6 June 2018.
- 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (4063) Euforbo". Geneva Observatory. Retrieved 6 June 2018.
- 1 2 3 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 6 June 2018.
- ↑ 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" (PDF). Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 6 June 2018.
- 1 2 "Asteroid 4063 Euforbo". Small Bodies Data Ferret. Retrieved 6 June 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 6 June 2018.
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
- 4063 Euforbo at AstDyS-2, Asteroids—Dynamic Site
- 4063 Euforbo at the JPL Small-Body Database
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