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90632 (2259 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2090632
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1344819965223028 3.0797e-08  
a 2.517812987620123 8.4342e-09 au
q 2.179212470175185 7.997e-08 au
i .2551537645351935 4.0028e-06 deg
node 244.775062702497 0.00079102 deg
peri 83.18790226824399 0.00079118 deg
M 275.7045680228834 1.6737e-05 deg
tp 2459342.192283236095
(2021-May-07.69228324)
6.8178e-05 TDB
period 1459.263201811306
4.00
7.3324e-06
2.008e-08
d
yr
n .2466998410931976 1.2396e-09 deg/d
Q 2.856413505065061 9.5684e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1452  
   data-arc span      17066 days (46.72 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52116  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:36:19  

Additional Information
 Earth MOID = 1.16779 au 
 Jupiter MOID = 2.45755 au 
 T_jup = 3.445 
[ 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 15.6   n/a MPO337935  
rotation period rot_per 2.468 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.]

90632 (2259 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 2259 T-2 = 1997 XY2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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