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68 Leto
Classification: Main-belt Asteroid          SPK-ID: 2000068
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1871691071690845 3.0226e-08  
a 2.781449623537358 5.4294e-09 au
q 2.260848180864084 8.3686e-08 au
i 7.971455320585142 3.6246e-06 deg
node 44.1280473396174 2.7706e-05 deg
peri 304.8626984075516 2.9291e-05 deg
M 6.192563685413208 9.5336e-06 deg
tp 2457371.354386218182
(2015-Dec-14.85438622)
4.4843e-05 JED
period 1694.358184183015
4.64
4.9611e-06
1.358e-08
d
yr
n .212469832742942 6.2211e-10 deg/d
Q 3.302051066210631 6.4456e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1706  
   data-arc span      55531 days (152.04 yr)  
   first obs. used      1863-11-30  
   last obs. used      2015-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61956  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:30:52  

Additional Information
 Earth MOID = 1.26472 au 
 Jupiter MOID = 2.16063 au 
 T_jup = 3.293 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.78 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
magnitude slope G 0.05   n/a PDS3 (MPC 17257) Fit
diameter diameter 122.57 km 5.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
rotation period rot_per 14.848 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Surdej, J.; Schober, H.J. (1980) Astron. Astrophys. Suppl. Ser. 41, 335-338.]
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2005) Planetary and Space Science 53, 1147-1165.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[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.]
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.2283   0.021 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
B-V BV .845 mag .023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=2.68, mean=11.30, max.=17.60) deg.
U-B UB .488 mag .025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=2.68, mean=11.30, max.=17.60) 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

68 Leto          Discovered 1861-Apr-29 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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