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101491 Grahamcrombie (1998 XA)
Classification: Main-belt Asteroid          SPK-ID: 2101491
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3098499822669289 6.4824e-08  
a 2.55870275975212 1.7445e-08 au
q 1.765888755016583 1.7276e-07 au
i 13.76575875462038 6.0839e-06 deg
node 85.65797462944727 3.1704e-05 deg
peri 306.8520613846835 3.5303e-05 deg
M 109.4673860785862 1.8927e-05 deg
tp 2458545.919889036551
(2019-Mar-03.41988904)
7.4685e-05 TDB
period 1494.955217340795
4.09
1.5289e-05
4.186e-08
d
yr
n .2408098890349123 2.4628e-09 deg/d
Q 3.351516764487656 2.2851e-08 au
  Orbit Determination Parameters
   # obs. used (total)      349  
   data-arc span      7839 days (21.46 yr)  
   first obs. used      1998-12-01  
   last obs. used      2020-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58854  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:00:17  

Additional Information
 Earth MOID = .810205 au 
 Jupiter MOID = 2.17882 au 
 T_jup = 3.329 
[ 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 16.1   n/a MPO469021  
diameter diameter 3.303 km 0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101491 Grahamcrombie           Discovered 1998 Dec. 1 by I. P. Griffin at Cocoa.
Graham William Crombie (1963-2019) was a New Zealand-born chartered accountant. As Chairman of the Otago Museum Trust Board between 2011 and 2019, he championed the construction of the world's southernmost planetarium, which opened in December 2015.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2019-12-12Last Updated: 2019-12-13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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