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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 76 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1230441222799924 3.6705e-08  
a 3.011633199193051 1.2742e-08 au
q 2.641069435569056 1.1122e-07 au
i 13.01268084879196 4.3593e-06 deg
node 87.98146202492899 1.8349e-05 deg
peri 304.3107002664303 2.5965e-05 deg
M 93.60493008169195 1.7957e-05 deg
tp 2458504.138871448967
(2019-Jan-20.63887145)
9.5544e-05 TDB
period 1908.98071418272
5.23
1.2115e-05
3.317e-08
d
yr
n .1885823137580123 1.1968e-09 deg/d
Q 3.382196962817045 1.431e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2703  
   data-arc span      38696 days (105.94 yr)  
   first obs. used      1914-11-21  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3781  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:26:50  

Additional Information
 Earth MOID = 1.67411 au 
 Jupiter MOID = 2.05922 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-August); 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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