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691 Lehigh (A909 XB)
Classification: Main-belt Asteroid          SPK-ID: 2000691
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1228289790084176 4.3857e-08  
a 3.011717261454028 1.4844e-08 au
q 2.641791105167602 1.3646e-07 au
i 13.01299843240004 4.6281e-06 deg
node 87.98229448266126 2.0742e-05 deg
peri 304.3918007107482 2.7839e-05 deg
M 18.12155274617417 1.8096e-05 deg
tp 2458504.402380252214
(2019-Jan-20.90238025)
9.6017e-05 TDB
period 1909.060641423612
5.23
1.4114e-05
3.864e-08
d
yr
n .1885744183231096 1.3942e-09 deg/d
Q 3.381643417740453 1.6668e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2195  
   data-arc span      38358 days (105.02 yr)  
   first obs. used      1914-11-21  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41096  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:10:39  

Additional Information
 Earth MOID = 1.67423 au 
 Jupiter MOID = 2.05846 au 
 T_jup = 3.199 
[ 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 9.3   n/a MPO384751  
diameter diameter 79.451 km 0.564 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.891 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.053   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.743   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=17.72 deg.
U-B UB 0.340   0.068 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=17.72 deg.
Tholen spectral type spec_T CD:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

691 Lehigh (A909 XB)          Discovered 1909-Dec-11 by Metcalf, J. H. at Taunton
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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