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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 | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 114 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1901003495094241 3.349e-08  
a 2.445056262162432 3.5461e-09 au
q 1.980250212155148 8.1703e-08 au
i 4.612230839652852 3.9775e-06 deg
node 206.5324289449702 5.2225e-05 deg
peri 201.5240450789871 5.3427e-05 deg
M 23.06395104916572 1.2287e-05 deg
tp 2459111.032990875684
(2020-Sep-18.53299088)		 4.7607e-05 TDB
period 1396.470327919765
3.82		 3.0379e-06
8.317e-09		 d
yr
n .2577928028991992 5.6081e-10 deg/d
Q 2.909862312169717 4.2202e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2886  
   data-arc span      57431 days (157.24 yr)  
   first obs. used      1863-10-05  
   last obs. used      2020-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47973  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:43:14  

Additional Information
 Earth MOID = .990002 au 
 Jupiter MOID = 2.47803 au 
 T_jup = 3.470 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454606.5 (2008-May-20.0) TDB
Reference: JPL 114 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1906100225427395 3.3797e-08  
q 1.979613081651395 8.2432e-08 au
tp 2454918.979602082430
(2009-Mar-28.47960208)		 4.467e-05 TDB
node 206.6972695535736 5.2092e-05 deg
peri 200.745460937451 5.3273e-05 deg
i 4.616231970789801 3.984e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2886  
   data-arc span      57431 days (157.24 yr)  
   first obs. used      1863-10-05  
   last obs. used      2020-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47973  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:43:14  

Additional Information
 Jupiter MOID = 2.47803 au 
 T_jup = 3.470 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.142260956033216E-15 -2.78423768661179E-15 1.685715200385757E-14 -4.414640577640426E-15 -4.414882294185881E-16 -2.605696145751001E-16
q -2.78423768661179E-15 6.795044274815149E-15 -1.566270898403465E-14 1.234397492518716E-14 4.597987828881216E-15 5.609232389208938E-16
tp 1.685715200385757E-14 -1.566270898403465E-14 1.995408939416787E-9 4.10489454893077E-12 5.163690343392056E-10 -4.731840617862099E-13
node -4.414640577640426E-15 1.234397492518716E-14 4.10489454893077E-12 2.713599739564503E-9 -2.70329799659965E-9 -1.639246294921253E-11
peri -4.414882294185881E-16 4.597987828881216E-15 5.163690343392056E-10 -2.70329799659965E-9 2.83802137824252E-9 1.624944151959487E-11
i -2.605696145751001E-16 5.609232389208938E-16 -4.731840617862099E-13 -1.639246294921253E-11 1.624944151959487E-11 1.587226407361724E-11

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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

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