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JPL Small-Body Database Browser
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34961 (2252 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2034961
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1629056962742245 4.3174e-08  
a 2.766696553516511 1.1956e-08 au
q 2.315985925086406 1.2062e-07 au
i 8.943252905017497 5.2702e-06 deg
node 1.030536027247692 2.2073e-05 deg
peri 18.39116835600655 2.5568e-05 deg
M 44.22296243529424 1.1528e-05 deg
tp 2458794.016167839615
(2019-Nov-06.51616784)
5.3841e-05 TDB
period 1680.895523145973
4.60
1.0896e-05
2.983e-08
d
yr
n .2141715502497276 1.3883e-09 deg/d
Q 3.217407181946616 1.3904e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1512  
   data-arc span      17850 days (48.87 yr)  
   first obs. used      1971-03-24  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4873  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 03:39:42  

Additional Information
 Earth MOID = 1.31958 au 
 Jupiter MOID = 2.26129 au 
 T_jup = 3.302 
[ 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 13.6   n/a MPO347776  
diameter diameter 4.859 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.975 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.430   0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

34961 (2252 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20020128/Numbers.arcLast Updated: 2004-04-19

[ 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
2022-Dec-23 19:50 00:01 Eunom 0.0393205459120146 0.0393179010743906 0.0393231907629137 3.33781613082985 3.33781602387218 2459937.326149551 1.04477425003465 136.724589719072 26.4977172932332 15.8957054906033 73432.3984718305 T 27 CATAB v2.0f-lin.ifort 2020-Feb-23 03:39:58 2020-Feb-23 03:40

Alternate Designations
 2252 T-2 = 2001 SG111 = 2061 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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