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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2003134477424353 2.6499e-08  
a 2.295291517189751 3.5434e-09 au
q 1.835513759807506 6.0748e-08 au
i 8.676073494987232 3.835e-06 deg
node 218.6882237658396 1.9864e-05 deg
peri 139.619521401314 2.2502e-05 deg
M 210.6623847622299 1.1174e-05 deg
tp 2459527.392377107207
(2021-Nov-08.89237711)
4.0031e-05 TDB
period 1270.150560905842
3.48
2.9412e-06
8.053e-09
d
yr
n .2834309656512346 6.5633e-10 deg/d
Q 2.755069274571995 4.2532e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2750  
   data-arc span      56562 days (154.86 yr)  
   first obs. used      1865-10-08  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50526  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:35  

Additional Information
 Earth MOID = .842636 au 
 Jupiter MOID = 2.73882 au 
 T_jup = 3.553 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454615.5 (2008-May-29.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1998786863227108 2.6525e-08  
q 1.837102770265963 6.0803e-08 au
tp 2454443.712959933344
(2007-Dec-09.21295993)
3.5233e-05 TDB
node 218.8073144297194 1.9911e-05 deg
peri 139.2385001935304 2.2526e-05 deg
i 8.661958405085981 3.8306e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2750  
   data-arc span      56562 days (154.86 yr)  
   first obs. used      1865-10-08  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50526  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:35  

Additional Information
 Jupiter MOID = 2.73882 au 
 T_jup = 3.553 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.03575554660043E-16 -1.611043907880905E-15 1.907996349027282E-13 -8.041995197038968E-16 4.477328194531062E-14 -2.908502530960395E-16
q -1.611043907880905E-15 3.697023660756738E-15 -4.109749569875654E-13 1.845744237021839E-15 -9.546765368806736E-14 7.85678724880934E-16
tp 1.907996349027282E-13 -4.109749569875654E-13 1.241348613479425E-9 -1.011164155694518E-11 3.770306813872431E-10 2.006824373790395E-12
node -8.041995197038968E-16 1.845744237021839E-15 -1.011164155694518E-11 3.964656211407864E-10 -3.945144884379844E-10 1.052267525517722E-11
peri 4.477328194531062E-14 -9.546765368806736E-14 3.770306813872431E-10 -3.945144884379844E-10 5.074314536785724E-10 -9.785233868041363E-12
i -2.908502530960395E-16 7.85678724880934E-16 2.006824373790395E-12 1.052267525517722E-11 -9.785233868041363E-12 1.467338136059878E-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 8.0   n/a MPO502153 IRAS observations used: 29
diameter diameter 68.563 km 1.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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

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