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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1013743321129017 4.0309e-08  
a 2.213391523432856 6.2209e-09 au
q 1.989010436040493 9.0276e-08 au
i 2.751229248616999 4.4279e-06 deg
node 5.859530310547492 6.9124e-05 deg
peri 1.856096967603126 7.1145e-05 deg
M 276.2989336933389 1.767e-05 deg
tp 2458880.149650196134
(2020-Jan-31.64965020)
5.9408e-05 TDB
period 1202.778871439496
3.29
5.0708e-06
1.388e-08
d
yr
n .2993068871995973 1.2618e-09 deg/d
Q 2.43777261082522 6.8516e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2605  
   data-arc span      29998 days (82.13 yr)  
   first obs. used      1937-09-14  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44271  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:18:26  

Additional Information
 Earth MOID = .986738 au 
 Jupiter MOID = 2.96515 au 
 T_jup = 3.647 
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Orbital Elements at Epoch 2456292.5 (2012-Dec-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1012531165803742 4.0309e-08  
q 1.988821789931157 9.027e-08 au
tp 2456475.218384996284
(2013-Jul-01.71838500)
5.7056e-05 TDB
node 5.957673311816961 6.9087e-05 deg
peri 1.793406303812888 7.1115e-05 deg
i 2.752729890512661 4.4283e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2605  
   data-arc span      29998 days (82.13 yr)  
   first obs. used      1937-09-14  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44271  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:18:26  

Additional Information
 Jupiter MOID = 2.96515 au 
 T_jup = 3.647 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.624835511148114E-15 -3.632071809917815E-15 -1.913908413436914E-13 8.930390924647635E-16 -4.001706134757521E-14 -3.644882555037914E-16
q -3.632071809917815E-15 8.14875974626698E-15 4.734806208006713E-13 -2.436640143009493E-15 1.001881757420983E-13 8.319451398181962E-16
tp -1.913908413436914E-13 4.734806208006713E-13 3.255385123329737E-9 3.403449319911681E-13 9.690723321128206E-10 4.738188584879483E-13
node 8.930390924647635E-16 -2.436640143009493E-15 3.403449319911681E-13 4.772971150926011E-9 -4.766709453029752E-9 -3.549150331355243E-12
peri -4.001706134757521E-14 1.001881757420983E-13 9.690723321128206E-10 -4.766709453029752E-9 5.0573751640379E-9 3.679308841567685E-12
i -3.644882555037914E-16 8.319451398181962E-16 4.738188584879483E-13 -3.549150331355243E-12 3.679308841567685E-12 1.961000820515595E-11

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-January); 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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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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