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JPL Small-Body Database Browser
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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1012641922668782 4.0191e-08  
a 2.212784235762904 6.0504e-09 au
q 1.988708427467492 9.0061e-08 au
i 2.751404798521962 4.4171e-06 deg
node 5.841699706044422 6.8525e-05 deg
peri 2.068237193221584 7.0551e-05 deg
M 35.87418136370257 1.7653e-05 deg
tp 2458880.691804047907
(2020-Feb-01.19180405)
5.8807e-05 TDB
period 1202.283896194865
3.29
4.9311e-06
1.35e-08
d
yr
n .2994301105914934 1.2281e-09 deg/d
Q 2.436860044058315 6.6631e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2705  
   data-arc span      30066 days (82.32 yr)  
   first obs. used      1937-09-14  
   last obs. used      2020-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43884  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:41:02  

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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1980-Apr-07 21:10 < 00:01 Hebe 0.0274307210019988 0.0274303531985848 0.0274310888263939 6.62385420746174 6.62385417324729 2444337.381771765 0.219154338099212 103.790053515954 17.0341315055474 -86.1976672549172 240326.813357533 T 38 CATAB v2.0f-lin.ifort 2020-Jan-28 18:41:46 2020-Jan-28 18:41

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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