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22917 (1999 TA77)
Classification: Main-belt Asteroid          SPK-ID: 2022917
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1808105540595725 3.9356e-08  
a 2.353341762275446 7.5889e-09 au
q 1.927832734346892 9.2027e-08 au
i 1.171603657348398 4.693e-06 deg
node 329.86174073 0.00014848 deg
peri 234.3618003825431 0.00014884 deg
M 146.0648743273476 1.1271e-05 deg
tp 2458665.480984039413
(2019-Jun-30.98098404)
4.0322e-05 TDB
period 1318.639040582461
3.61
6.3784e-06
1.746e-08
d
yr
n .2730087529040419 1.3206e-09 deg/d
Q 2.778850790204 8.9611e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1390  
   data-arc span      13758 days (37.67 yr)  
   first obs. used      1983-04-09  
   last obs. used      2020-12-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51394  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:14:45  

Additional Information
 Earth MOID = .923574 au 
 Jupiter MOID = 2.18262 au 
 T_jup = 3.534 
[ 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 15.34   n/a E2021B10  
rotation period rot_per 25.806 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.]

22917 (1999 TA77)          Discovered 1999-Oct-10 by Spacewatch at Kitt Peak
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TA77 = 1983 GG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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