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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1871779572580662 3.0246e-08  
a 2.780997718180385 5.3958e-09 AU
q 2.260456246152037 8.3729e-08 AU
i 7.971901263757768 3.6412e-06 deg
node 44.13690283238304 2.7751e-05 deg
peri 304.9295201278829 2.934e-05 deg
M 281.1376150095903 9.5226e-06 deg
tp 2457371.579345514798
(2015-Dec-15.07934551)
4.5152e-05 JED
period 1693.945274436893
4.64
4.93e-06
1.35e-08
d
yr
n .2125216235923988 6.1852e-10 deg/d
Q 3.301539190208733 6.4058e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1664  
   data-arc span      55320 days (151.46 yr)  
   first obs. used      1863-11-30  
   last obs. used      2015-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62247  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:27:03  

Additional Information
 Earth MOID = 1.26652 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-July); Warner et al., 2009 Published Reference List:
[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]
[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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