Astronomy:4063 Euforbo

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Short description: Jupiter trojan asteroid
4063 Euforbo
Discovery [1]
Discovered bySan Vittore Obs.
Discovery siteSan Vittore Obs.
Discovery date1 February 1989
Designations
(4063) Euforbo
Pronunciation/juːˈfɔːrboʊ/[6]
Named afterEuphorbus (Euforbo) [1]
(Greek mythology)
1989 CG2 · 1943 EV
1951 XJ · 1970 LC
1974 VO2
Minor planet categoryJupiter trojan [1][2][3]
Greek [4][5] · background [5]
AdjectivesEuforbian
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc75.21 yr (27,471 d)
|{{{apsis}}}|helion}}5.7958 AU
|{{{apsis}}}|helion}}4.5747 AU
5.1852 AU
Eccentricity0.1177
Orbital period11.81 yr (4,313 d)
Mean anomaly224.59°
Mean motion0° 5m 0.6s / day
Inclination18.941°
Longitude of ascending node113.51°
318.44°
Jupiter MOID0.4441 AU
TJupiter2.8790
Physical characteristics
Mean diameter95.62±0.68 km[7]
102.35 km (derived)[3]
102.46±4.1 km[8]
106.38±4.56 km[9]
Rotation period8.801±0.008 h[10][lower-alpha 1]
8.84±0.01 h[11][lower-alpha 1]
8.841±0.025 h[12]
8.845±0.0050 h[13]
8.846±0.001 h[14]
10.4±0.6 h[15]
Geometric albedo0.0558 (derived)[3]
0.057±0.005[9]
0.0611±0.005[8]
0.070±0.005[7]
C (assumed)[3]
D (S3OS2-TH)[16]
D (S3OS2-BB)[16]
V–I = 0.950±0.014[3]
Absolute magnitude (H)8.489±0.001[13]
8.60[7][9]
8.7[1][2][3]
8.76±0.18[17]


4063 Euforbo 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 its orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.[5][18]

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.[16][18] 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 ({{{1}}}).[10][11][12][13][15][lower-alpha 1] In November 2010, the best-rated lightcurve by James W. Brinsfield at the Via Capote Observatory (G69), California, gave a rotation period of 8.846 hours with a brightness amplitude of 0.19 magnitude ({{{1}}}).[3][14]

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.[7][8][9]

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

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).[19]

Notes

  1. ↑ Jump up to: 1.0 1.1 1.2 Lightcurve plots of (4063) Euforbo from May 2015 and May 2016 by Robert Stephens at the Center for Solar System Studies (U81). Quality code is 3/3 (lightcurve rating at CS3). Summary figures at the LCDB and CS3.

References

  1. ↑ Jump up to: 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "4063 Euforbo (1989 CG2)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=4063. 
  2. ↑ Jump up to: 2.0 2.1 2.2 2.3 "JPL Small-Body Database Browser: 4063 Euforbo (1989 CG2)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004063. 
  3. ↑ Jump up to: 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 "LCDB Data for (4063) Euforbo". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=4063%7CEuforbo. 
  4. ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html. 
  5. ↑ Jump up to: 5.0 5.1 5.2 "Asteroid (4063) Euforbo – Proper elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?n=4063&pc=1.1.6. 
  6. ↑ 'Euphorbus' in Noah Webster (1884) A Practical Dictionary of the English Language
  7. ↑ Jump up to: 7.0 7.1 7.2 7.3 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. doi:10.1088/0004-637X/759/1/49. Bibcode: 2012ApJ...759...49G.  (online catalog)
  8. ↑ Jump up to: 8.0 8.1 8.2 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: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 15 June 2018. 
  9. ↑ Jump up to: 9.0 9.1 9.2 9.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  10. ↑ Jump up to: 10.0 10.1 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. ISSN 1052-8091. Bibcode: 2016MPBu...43..323S. 
  11. ↑ Jump up to: 11.0 11.1 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. ISSN 1052-8091. Bibcode: 2016MPBu...43...15S. 
  12. ↑ Jump up to: 12.0 12.1 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. doi:10.1088/0004-6256/141/5/170. Bibcode: 2011AJ....141..170M. 
  13. ↑ Jump up to: 13.0 13.1 13.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. 
  14. ↑ Jump up to: 14.0 14.1 Brinsfield, J. W. (April 2011). "Asteroid Lightcurve Analysis at the Via Capote Observatory: 4th Quarter 2010". The Minor Planet Bulletin 38 (2): 73–74. ISSN 1052-8091. Bibcode: 2011MPBu...38...73B. 
  15. ↑ Jump up to: 15.0 15.1 Behrend, Raoul. "Asteroids and comets rotation curves – (4063) Euforbo". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#004063. 
  16. ↑ Jump up to: 16.0 16.1 16.2 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". Icarus 172 (1): 179–220. doi:10.1016/j.icarus.2004.06.006. Bibcode: 2004Icar..172..179L. http://sirrah.troja.mff.cuni.cz/yarko-site/tmp/eos/NEW/spectral_type_figure/s3os2.pdf. Retrieved 6 June 2018. 
  17. ↑ 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. 
  18. ↑ Jump up to: 18.0 18.1 "Asteroid 4063 Euforbo". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=4063+Euforbo. 
  19. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 

External links



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