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624 Hektor (1907 XM)
Classification: Jupiter Trojan          SPK-ID: 2000624
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02430462530615197 6.8834e-08  
a 5.248501475968061 6.1158e-08 AU
q 5.120938614175872 3.6995e-07 AU
i 18.17070056163026 7.4526e-06 deg
node 342.8130120640209 2.0996e-05 deg
peri 181.4732367924956 0.00013903 deg
M 25.10804172871086 0.00013672 deg
tp 2456494.189592288096
(2013-Jul-20.68959229)
0.0016677 JED
period 4391.8895773616
12.02
7.6765e-05
2.102e-07
d
yr
n .08196927396709909 1.4327e-09 deg/d
Q 5.37606433776025 6.2645e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1423  
   data-arc span      39138 days (107.15 yr)  
   first obs. used      1907-02-11  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56388  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:35:51  

Additional Information
 Earth MOID = 4.12904 AU 
 T_jup = 2.899 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.2 mag n/a MPO263349  
diameter diameter 225 km n/a J.G. Williams 9-90  
rotation period rot_per 6.924 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Dunlap, J.L.; Gehrels, T. (1969) Astron. J. 74, 796-803.]
[Magnusson, P. (1983) in Asteroids, Comets, Meteors. C.-I. Lagerkvist, H. Rickman, eds. Uppsala, pp. 77-85.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Uchida, K.; Goguen, J.D. (1987) Bull. Amer. Astron. Soc. 19, 842.]
[Michalowski, T. (1988) Acta Astronomica 38, 455-468.]
[De Angelis, G. (1992) in Physical properties of small solar system bodies. A. Brahic, J.-C. Gerard, J. Surdej, eds. Universite de Liege, Institut d'Astrophysique, Liege, pp. 195-201.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Szabo, Gy.; Sarneczky, K.; Kiss, L.L. (1999) in Proc. IAU Coll. 173, Evolution and Source Regions of Asteroids and Comets, 185-188.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Astron. Astrophys. 383, L19-L22.]
[Hamanowa, H.; Hamanowa, H. (2009) Minor Planet Bul. 36, 87-88.]
[Stephens, R.D. (2009) Minor Planet Bul. 36, 59-62.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.025   n/a EAR-A-5-DDR-ALBEDOS-V1.0:TRIAD TRIAD quality code 3
B-V BV .776 mag .027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=9; phase (min.=3.84, mean=5.77, max.=7.78) deg.
U-B UB .249 mag .034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=3.84, mean=6.11, max.=7.78) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

624 Hektor (1907 XM)          Discovered 1907-Feb-10 by Kopff, A. at Heidelberg (024)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1907 XM = 1948 VD 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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