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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 85 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1234555545442972 2.0005e-08  
a 3.010479724917504 1.1117e-08 au
q 2.638819281033451 6.0686e-08 au
i 13.01252180192358 6.4538e-07 deg
node 87.9705774680949 3.9095e-06 deg
peri 304.2308228045893 8.7179e-06 deg
M 168.3779282254886 9.6558e-06 deg
tp 2458504.151192510853
(2019-Jan-20.65119251)
4.9296e-05 TDB
period 1907.884091945155
5.22
1.0568e-05
2.893e-08
d
yr
n .1886907079522674 1.0452e-09 deg/d
Q 3.382140168801558 1.2489e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3323  
   data-arc span      38936 days (106.60 yr)  
   first obs. used      1914-11-21  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35826  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:26:16  

Additional Information
 Earth MOID = 1.67132 au 
 Jupiter MOID = 2.06182 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 9.35   n/a E2021B10  
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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