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21792 (1999 ST7)
Classification: Main-belt Asteroid          SPK-ID: 2021792
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .234230605536742 3.597e-08  
a 3.186173012905348 1.5813e-08 au
q 2.439873778747703 1.1128e-07 au
i 10.11417108384302 5.0487e-06 deg
node 25.953547533611 1.9637e-05 deg
peri 43.58917538956433 2.2163e-05 deg
M 207.529725051152 1.0346e-05 deg
tp 2460080.302398818743
(2023-May-15.80239882)
6.3721e-05 TDB
period 2077.315487763148
5.69
1.5465e-05
4.234e-08
d
yr
n .1733005901706571 1.2902e-09 deg/d
Q 3.932472247062993 1.9517e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1600  
   data-arc span      9387 days (25.70 yr)  
   first obs. used      1994-11-04  
   last obs. used      2020-07-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46855  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:54:57  

Additional Information
 Earth MOID = 1.4645 au 
 Jupiter MOID = 1.53356 au 
 T_jup = 3.131 
[ 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 13.11   n/a E2021B10  
diameter diameter 14.083 km 0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.248 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.]
geometric albedo albedo 0.062   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21792 (1999 ST7)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 ST7 = 1994 VT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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