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JPL Small-Body Database Browser
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1233 Kobresia (1931 TG2)
Classification: Main-belt Asteroid          SPK-ID: 2001233
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05578863449080277 3.2217e-08  
a 2.555020153420576 8.9025e-09 au
q 2.41247906796476 8.3079e-08 au
i 5.60389438481837 3.9655e-06 deg
node 291.419083800952 3.7338e-05 deg
peri 335.2732660538649 5.4621e-05 deg
M 261.7155437132602 4.1515e-05 deg
tp 2459007.760472440873
(2020-Jun-07.26047244)
0.00017278 TDB
period 1491.728963234798
4.08
7.7965e-06
2.135e-08
d
yr
n .2413307034136711 1.2613e-09 deg/d
Q 2.697561238876391 9.3992e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2652  
   data-arc span      33457 days (91.60 yr)  
   first obs. used      1927-10-03  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43626  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:20:44  

Additional Information
 Earth MOID = 1.39721 au 
 Jupiter MOID = 2.36477 au 
 T_jup = 3.429 
[ 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 11.5   n/a MPO458839  
diameter diameter 33.323 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 27.83 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:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.047   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1233 Kobresia (1931 TG2)          Discovered 1931-Oct-10 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1931 TG2 = 1927 TB = 1951 QJ = 1951 RP1 = 1954 EG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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