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16979 (1999 AO4)
Classification: Main-belt Asteroid          SPK-ID: 2016979
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2294477200940208 3.8094e-08  
a 2.672735814490426 1.064e-08 au
q 2.059482675441962 1.0417e-07 au
i 11.96967457091469 3.398e-06 deg
node 116.8318118618979 1.9728e-05 deg
peri 122.0923952164291 2.0972e-05 deg
M 283.313003941313 8.5359e-06 deg
tp 2459540.478694644512
(2021-Nov-21.97869464)
3.8801e-05 TDB
period 1595.9984920828
4.37
9.5304e-06
2.609e-08
d
yr
n .2255641228897372 1.3469e-09 deg/d
Q 3.28598895353889 1.3081e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2392  
   data-arc span      14226 days (38.95 yr)  
   first obs. used      1982-03-30  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41339  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:49:57  

Additional Information
 Earth MOID = 1.07315 au 
 Jupiter MOID = 1.85829 au 
 T_jup = 3.312 
[ 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 13.63   n/a E2021B10  
rotation period rot_per 3.845 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

16979 (1999 AO4)          Discovered 1999-Jan-11 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 AO4 = 1982 FG4 = 1991 LS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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