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99921 (1999 RO190)
Classification: Main-belt Asteroid          SPK-ID: 2099921
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .142360921235013 3.0698e-08  
a 2.457719499632527 9.6759e-09 au
q 2.107836287527585 7.466e-08 au
i 6.456270922912128 3.8778e-06 deg
node 12.95433722594134 3.9365e-05 deg
peri 29.28832787149263 4.3548e-05 deg
M 160.6052780135243 2.0404e-05 deg
tp 2458572.652437659036
(2019-Mar-30.15243766)
7.788e-05 TDB
period 1407.333091654147
3.85
8.3109e-06
2.275e-08
d
yr
n .2558029809253362 1.5106e-09 deg/d
Q 2.807602711737469 1.1053e-08 au
  Orbit Determination Parameters
   # obs. used (total)      958  
   data-arc span      9028 days (24.72 yr)  
   first obs. used      1995-08-25  
   last obs. used      2020-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48117  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:29:39  

Additional Information
 Earth MOID = 1.11742 au 
 Jupiter MOID = 2.61084 au 
 T_jup = 3.469 
[ 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 15.47   n/a E2021B10  
rotation period rot_per 9.59509 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

99921 (1999 RO190)          Discovered 1999-Sep-15 by Pravec, P., Kusnirak, P. at Ondrejov
Reference: 20050622/Numbers.arcLast Updated: 2005-06-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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