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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3100309118817343 6.4845e-08  
a 2.55825958132947 1.7428e-08 au
q 1.765120030499711 1.7278e-07 au
i 13.76598452442778 6.0838e-06 deg
node 85.65270315355582 3.1707e-05 deg
peri 306.8348538757512 3.53e-05 deg
M 157.6574344303673 1.9335e-05 deg
tp 2458545.973408887317
(2019-Mar-03.47340889)
7.462e-05 TDB
period 1494.566835061855
4.09
1.5273e-05
4.182e-08
d
yr
n .2408724665599186 2.4614e-09 deg/d
Q 3.35139913215923 2.2831e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58879  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:02  

Additional Information
 Earth MOID = .808558 au 
 Jupiter MOID = 2.18015 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 16.01   n/a E2021B55  
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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