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59 Elpis (A860 RA)
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 114 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .118782068642792 2.4872e-08  
a 2.713549604189289 5.6946e-09 au
q 2.391228568838855 6.6516e-08 au
i 8.639914587206986 2.5636e-06 deg
node 170.0008696087205 2.3632e-05 deg
peri 210.8516988897848 2.8231e-05 deg
M 247.6888802654657 1.725e-05 deg
tp 2459509.860579219809
(2021-Oct-22.36057922)
7.9e-05 TDB
period 1632.695043487729
4.47
5.1395e-06
1.407e-08
d
yr
n .2204943301787549 6.9408e-10 deg/d
Q 3.035870639539722 6.371e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2881  
   data-arc span      56584 days (154.92 yr)  
   first obs. used      1865-12-09  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44951  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:50:44  

Additional Information
 Earth MOID = 1.39732 au 
 Jupiter MOID = 2.43446 au 
 T_jup = 3.335 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453925.5 (2006-Jul-09.0) TDB
Reference: JPL 114 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1169164136000425 2.5103e-08  
q 2.398493795985564 6.6833e-08 au
tp 2454612.868761407750
(2008-May-26.36876141)
7.4139e-05 TDB
node 170.2737990060087 2.3641e-05 deg
peri 210.5636223423781 2.8316e-05 deg
i 8.634591888979015 2.5613e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2881  
   data-arc span      56584 days (154.92 yr)  
   first obs. used      1865-12-09  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44951  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:50:44  

Additional Information
 Jupiter MOID = 2.43446 au 
 T_jup = 3.335 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.301393458242719E-16 -1.672637733890269E-15 4.746706176509738E-13 -3.797622344537613E-16 1.155246559061944E-13 2.329336568119979E-16
q -1.672637733890269E-15 4.466632472435565E-15 -1.164125937409224E-12 1.965820106044388E-15 -2.904611963449113E-13 -6.749023726772238E-16
tp 4.746706176509738E-13 -1.164125937409224E-12 5.49656583787083E-9 1.177645946066586E-11 1.173861728295266E-9 2.777276770259238E-12
node -3.797622344537613E-16 1.965820106044388E-15 1.177645946066586E-11 5.588743569438087E-10 -5.498577460571617E-10 -6.624454182328961E-12
peri 1.155246559061944E-13 -2.904611963449113E-13 1.173861728295266E-9 -5.498577460571617E-10 8.017992300016923E-10 7.165642146710731E-12
i 2.329336568119979E-16 -6.749023726772238E-16 2.777276770259238E-12 -6.624454182328961E-12 7.165642146710731E-12 6.560005178193799E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.0   n/a MPO473760 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. 2020-October); 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.]
[Pilcher, F. (2019) Minor Planet Bull. 46, 445-448.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 344-346.]
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 (A860 RA)          Discovered 1860-Sep-12 by Chacornac, J. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A860 RA = A900 SC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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