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
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 ]  
6516 Gruss (1988 TC2)
Classification: Main-belt Asteroid          SPK-ID: 2006516
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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.

[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .200541909900893 4.428e-08  
a 2.337389124599638 9.3847e-09 au
q 1.86864464537085 1.0392e-07 au
i 1.694455075843853 3.812e-06 deg
node 279.823432858715 0.00016037 deg
peri 82.71073679882596 0.00016069 deg
M 315.0575474860122 1.4369e-05 deg
tp 2459163.448070723180
5.2762e-05 TDB
period 1305.253767405932
n .275808435868732 1.6611e-09 deg/d
Q 2.806133603828426 1.1267e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1362  
   data-arc span      13766 days (37.69 yr)  
   first obs. used      1981-10-24  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5474  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:05:15  

Additional Information
 Earth MOID = .866958 au 
 Jupiter MOID = 2.65623 au 
 T_jup = 3.539 
[ 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 14.6   n/a MPO324368  
diameter diameter 6.185 km 1.736 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 13.003 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Clark, M. (2014) Minor Planet Bull. 41, 178-183.]
geometric albedo albedo 0.060   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

6516 Gruss           Discovered 1988 Oct. 3 by A. Mrkos at Klet.
Czech astronomer Gustav Gruss (1854-1922) was head of the Astronomical Institute of the Czech division of Charles University in Prague from 1891 to 1914. He studied the spectroscopy of variable stars. The name was suggested by J. Ticha and M. Šolc.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1988 TC2 = 1981 UV17 = 1981 WA6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Apr-05 07:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin