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80 Sappho
Classification: Main-belt Asteroid          SPK-ID: 2000080
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2000874199975063 2.26e-08  
a 2.2957954354115 3.6334e-09 AU
q 1.836435649897961 5.1741e-08 AU
i 8.664454219505219 3.5144e-06 deg
node 218.7745565226477 1.8702e-05 deg
peri 139.1394595296948 2.0196e-05 deg
M 4.536344385826435 8.5869e-06 deg
tp 2456984.489616835355
(2014-Nov-22.98961684)
3.0293e-05 JED
period 1270.56886537994
3.48
3.0162e-06
8.258e-09
d
yr
n .2833376527704768 6.7262e-10 deg/d
Q 2.755155220925039 4.3604e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1608  
   data-arc span      54448 days (149.07 yr)  
   first obs. used      1865-10-08  
   last obs. used      2014-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61841  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 12:40:49  

Additional Information
 Earth MOID = .843721 AU 
 T_jup = 3.553 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.98 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 29
diameter diameter 78.39 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 29
rotation period rot_per 14.030 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 Bul. 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.]
geometric albedo albedo 0.1848   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 29
B-V BV .901 mag .019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=7.56, mean=16.47, max.=25.92) deg.
U-B UB .523 mag .029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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          Discovered 1864-May-02 by Pogson, N. R. at Madras
May 3 is date of first measurement.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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