Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1012641925754726 4.0122e-08  
a 2.212784235723825 6.0423e-09 au
q 1.988708426749518 8.9924e-08 au
i 2.751404892325986 4.4033e-06 deg
node 5.841699398887436 6.8506e-05 deg
peri 2.068237409273193 7.0531e-05 deg
M 35.87418147300283 1.7641e-05 deg
tp 2458880.691803686053
(2020-Feb-01.19180369)		 5.8769e-05 TDB
period 1202.283896163016
3.29		 4.9245e-06
1.348e-08		 d
yr
n .2994301105994255 1.2264e-09 deg/d
Q 2.436860044698132 6.6542e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2721  
   data-arc span      30082 days (82.36 yr)  
   first obs. used      1937-09-14  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43799  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:28:14  

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

[ hide close-approach data ]
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 39 CATAB v2.0f-lin.ifort 2020-Feb-22 16:28:27 2020-Feb-22 16:28

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jun-02 02:12 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin