+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   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 2019-12-12 Last Updated: 2019-12-13 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-26 22:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin