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79 Eurynome (A863 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000079
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 119 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1902127690503477 2.213e-08  
a 2.445327664023617 3.0701e-09 au
q 1.980195117814266 5.4786e-08 au
i 4.612211786753522 2.0861e-07 deg
node 206.5246570529019 2.9918e-06 deg
peri 201.5411392659811 4.518e-06 deg
M 73.56895080356786 5.438e-06 deg
tp 2459111.072324851267
(2020-Sep-18.57232485)
2.0873e-05 TDB
period 1396.702847209296
3.82
2.6303e-06
7.201e-09
d
yr
n .2577498862548348 4.8541e-10 deg/d
Q 2.910460210232967 3.6541e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3043  
   data-arc span      57580 days (157.65 yr)  
   first obs. used      1863-10-05  
   last obs. used      2021-05-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48145  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:30:25  

Additional Information
 Earth MOID = .990317 au 
 Jupiter MOID = 2.47844 au 
 T_jup = 3.470 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457226.5 (2015-Jul-23.0) TDB
Reference: JPL 119 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1913804014078056 2.2164e-08  
q 1.97671423119136 5.4891e-08 au
tp 2457711.489292428626
(2016-Nov-18.98929243)
1.972e-05 TDB
node 206.6284174465635 2.9895e-06 deg
peri 200.8408867341174 4.4764e-06 deg
i 4.617212779220949 2.0913e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3043  
   data-arc span      57580 days (157.65 yr)  
   first obs. used      1863-10-05  
   last obs. used      2021-05-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48145  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:30:25  

Additional Information
 Jupiter MOID = 2.47844 au 
 T_jup = 3.470 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.912370647450122E-16 -1.215416871641403E-15 -7.833580862294167E-14 3.860853867455633E-14 -2.342883211892731E-14 2.419801183660206E-15
q -1.215416871641403E-15 3.012986208066932E-15 2.072978362370259E-13 -9.541151036420533E-14 5.995238817450715E-14 -5.960862309233018E-15
tp -7.833580862294167E-14 2.072978362370259E-13 3.888705120818317E-10 -4.047359993778259E-12 7.477066523420858E-11 -2.779943506555043E-13
node 3.860853867455633E-14 -9.541151036420533E-14 -4.047359993778259E-12 8.937089365122985E-12 -6.958546301914293E-12 3.875571884666597E-13
peri -2.342883211892731E-14 5.995238817450715E-14 7.477066523420858E-11 -6.958546301914293E-12 2.00377540017914E-11 -3.268929913753979E-13
i 2.419801183660206E-15 -5.960862309233018E-15 -2.779943506555043E-13 3.875571884666597E-13 -3.268929913753979E-13 4.373581982600598E-14

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.99   n/a E2021B10 IRAS observations used: 12
magnitude slope G 0.25   n/a PDS3 (MPC 17257) Fit
diameter diameter 63.479 km 0.952 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.978 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Scaltriti, F.; Zappala, V. (1976) Astron. Astrophys. Suppl. Ser. 23, 167-179.]
[Schober, H.J. (1976) Icarus 28, 415-420.]
[Michalowski, T.; Velichko, F.P. (1990) Acta Astronomica 40, 321-332.]
[De Angelis, G. (1993) Planet. Space Sci. 41, 285-290.]
[De Angelis, G.; Mottola, S. (1995) Planet. Space Sci. 43, 1013-1017.]
[Michalowski, T. (1996) Icarus 123, 456-462.]
[Shevchenko, V.G.; Chiorny, V.G.; Kalashnikov, A.V.; Krugly, Yu.N.; et al. (1996) Astron. Astrophys. Suppl. Ser. 115, 475-479.]
[Szabo, Gy.; Sarneczky, K.; Kiss, L.L. (1999) in Proc. IAU Coll. 173, Evolution and Source Regions of Asteroids and Comets, 185-188.]
[Torppa, J.; Hentunen, V.-P.; Paakkonen, P.; Kehusmaa, P.; Muinonen, K. (2008) Icarus 198, 91-107.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.287   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.874   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=17.34, mean=20.18, max.=23.85) deg.
U-B UB 0.421   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=17.34, mean=20.70, max.=23.85) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

79 Eurynome (A863 RA)          Discovered 1863-Sep-14 by Watson, J. C. at Ann Arbor
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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