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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1013715856052356 1.5895e-08  
a 2.213155756190273 4.8222e-09 au
q 1.988804647993911 3.6103e-08 au
i 2.751359324976558 3.5649e-07 deg
node 5.836967977651706 5.9893e-06 deg
peri 2.142279835064286 8.0063e-06 deg
M 95.67607639675219 7.1481e-06 deg
tp 2458880.892286377600
(2020-Feb-01.39228638)
2.3601e-05 TDB
period 1202.586699175823
3.29
3.9304e-06
1.076e-08
d
yr
n .2993547161686732 9.7838e-10 deg/d
Q 2.437506864386635 5.311e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3259  
   data-arc span      30503 days (83.51 yr)  
   first obs. used      1937-09-14  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41435  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:25:49  

Additional Information
 Earth MOID = .985902 au 
 Jupiter MOID = 2.96382 au 
 T_jup = 3.647 
[ 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 12.32   n/a MPCxxxxx  
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. 2020-October); 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

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 ]
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