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JPL Small-Body Database Browser
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59 Elpis
Classification: Main-belt Asteroid          SPK-ID: 2000059
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .119291448707093 2.5966e-08  
a 2.71183615807797 6.6881e-09 au
q 2.388337294124572 6.8851e-08 au
i 8.641685581142685 2.6676e-06 deg
node 170.0264279184272 2.4184e-05 deg
peri 211.0823939639798 2.8805e-05 deg
M 159.1576648938412 1.7375e-05 deg
tp 2457879.361544494221
(2017-May-05.86154449)		 7.7642e-05 TDB
period 1631.148862074857
4.47		 6.0343e-06
1.652e-08		 d
yr
n .2207033388369423 8.1647e-10 deg/d
Q 3.035335022031369 7.486e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2355  
   data-arc span      57008 days (156.08 yr)  
   first obs. used      1863-04-11  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48612  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:02:28  

Additional Information
 Earth MOID = 1.39378 au 
 Jupiter MOID = 2.43193 au 
 T_jup = 3.336 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.93   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
diameter diameter 165.119 km 4.506 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 13.671 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Debehogne, H.; Surdej, A.; Surdej, J. (1978) Astron. Astrophys. Suppl. Ser. 33, 1-5.]
[Shevchenko, V.G.; Chiorny, V.G.; Kalashnikov, A.V.; Krugly, Yu.N.; et al. (1996) Astron. Astrophys. Suppl. Ser. 115, 475-479.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2018) Minor Planet Bull. 45, 181-182.]
geometric albedo albedo 0.044   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.662   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=17.13, mean=20.02, max.=21.48) deg.
U-B UB 0.285   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=17.13, mean=20.02, max.=21.48) deg.
Tholen spectral type spec_T CP   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

59 Elpis          Discovered 1860-Sep-12 by Chacornac, J. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A900 SC 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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