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21272 (1996 SA1)
Classification: Main-belt Asteroid          SPK-ID: 2021272
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1008097196975078 2.5544e-08  
a 2.21636768281873 6.3923e-09 au
q 1.992936277967159 5.5707e-08 au
i 9.152516150732035 5.8031e-06 deg
node 11.60183102857014 1.7891e-05 deg
peri 87.4719584702959 3.7004e-05 deg
M 101.8972568286463 3.2054e-05 deg
tp 2459055.369043340654
(2020-Jul-24.86904334)
0.00010675 TDB
period 1205.205598457681
3.30
5.214e-06
1.428e-08
d
yr
n .2987042214711723 1.2923e-09 deg/d
Q 2.439799087670302 7.0368e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1542  
   data-arc span      9047 days (24.77 yr)  
   first obs. used      1996-09-18  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5026  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:06:53  

Additional Information
 Earth MOID = 1.03431 au 
 Jupiter MOID = 2.68606 au 
 T_jup = 3.630 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.16   n/a MPCxxxxx  
rotation period rot_per 2.801 h n/a LCDB (Rev. 2020-October); 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.]

21272 (1996 SA1)          Discovered 1996-Sep-18 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 SA1 = 1998 HN36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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