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2675 Tolkien (1982 GB)
Classification: Main-belt Asteroid          SPK-ID: 2002675
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1012641940830779 4.0083e-08  
a 2.21278423550358 6.0367e-09 au
q 1.988708423215571 8.9829e-08 au
i 2.751404945888416 4.401e-06 deg
node 5.841701241986721 6.8494e-05 deg
peri 2.068235118174437 7.0518e-05 deg
M 35.87418211680703 1.7633e-05 deg
tp 2458880.691801553842
(2020-Feb-01.19180155)
5.874e-05 TDB
period 1202.283895983516
3.29
4.9199e-06
1.347e-08
d
yr
n .2994301106441302 1.2253e-09 deg/d
Q 2.43686004779159 6.648e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2734  
   data-arc span      30277 days (82.89 yr)  
   first obs. used      1937-09-14  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43736  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:55:23  

Additional Information
 Earth MOID = .987349 au 
 Jupiter MOID = 2.96499 au 
 T_jup = 3.648 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2   n/a MPO347541  
diameter diameter 10.960 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 1060. h n/a LCDB (Rev. 2019-August); 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:
[Durkee, R.I.; Brinsfield, J.W.; Hornoch, K.; Kusnirak, P. (2011) Minor Planet Bull. 38, 182-183.]
geometric albedo albedo 0.213   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2675 Tolkien (1982 GB)          Discovered 1982-Apr-14 by Watt, M. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1982 GB = 1934 VO = 1937 RH = 1939 FR = 1949 FO = 1950 QA1 = 1952 DX = 1969 JE = 1969 KB = 1970 RB = 1973 QX = 1975 BV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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