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80 Sappho (A864 JA)
Classification: Main-belt Asteroid          SPK-ID: 2000080
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2003977234169836 1.7584e-08  
a 2.295319488009139 2.6052e-09 au
q 1.835342688097472 4.0295e-08 au
i 8.676152199633499 2.2807e-07 deg
node 218.6872472964214 2.9155e-06 deg
peri 139.6014268880214 5.4097e-06 deg
M 267.3801794970447 3.4469e-06 deg
tp 2459527.286853782982
1.2445e-05 TDB
period 1270.173778388177
n .2834257848220046 4.8254e-10 deg/d
Q 2.755296287920807 3.1273e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2795  
   data-arc span      56775 days (155.44 yr)  
   first obs. used      1865-10-08  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50582  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:49:48  

Additional Information
 Earth MOID = .84091 au 
 Jupiter MOID = 2.73956 au 
 T_jup = 3.553 
[ 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 8.06   n/a E2021B10 IRAS observations used: 29
diameter diameter 68.563 km 1.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 14.030 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Debehogne, H.; Lagerkvist, C.-I.; Hahn, G. (1990) in Asteroids, Comets, Meteors III. C.-I. Lagerkvist, H. Rickman, B.A. Lindblad, M. Lindgren, eds. Uppsala, p. 45-48.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[Durech, J. (2006) IAU 2006, poster paper.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Pilcher, F. (2010) Minor Planet Bull. 37, 148-149.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.206   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.901   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=7.56, mean=16.47, max.=25.92) deg.
U-B UB 0.523   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=7.56, mean=18.69, max.=27.58) 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)

80 Sappho (A864 JA)          Discovered 1864-May-02 by Pogson, N. R. at Madras
May 3 is date of first measurement.
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2021-May-18 06:14 UT
(server date/time)  
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