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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1230441227395966 3.6694e-08  
a 3.011633198906962 1.2725e-08 au
q 2.64106943393401 1.1117e-07 au
i 13.01268088535614 4.3518e-06 deg
node 87.98146200462573 1.8348e-05 deg
peri 304.3107008134384 2.5941e-05 deg
M 93.60492968682598 1.7938e-05 deg
tp 2458504.138873613560
(2019-Jan-20.63887361)
9.5437e-05 TDB
period 1908.980713910705
5.23
1.2099e-05
3.313e-08
d
yr
n .1885823137848837 1.1952e-09 deg/d
Q 3.382196963879914 1.4291e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2721  
   data-arc span      38712 days (105.99 yr)  
   first obs. used      1914-11-21  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37701  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:55:26  

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. 2020-October); 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]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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