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JPL Small-Body Database Browser
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20725 (1999 XP120)
Classification: Main-belt Asteroid          SPK-ID: 2020725
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1105570329901303 3.6021e-08  
a 3.021464176397436 1.758e-08 au
q 2.687420061768968 1.0919e-07 au
i 10.19457256480547 4.5822e-06 deg
node 41.02595600816597 2.5936e-05 deg
peri 77.25979817210083 3.4906e-05 deg
M 199.0687821943812 2.4112e-05 deg
tp 2459458.055818574807
(2021-Aug-31.55581857)
0.00013168 TDB
period 1918.335664742306
5.25
1.6742e-05
4.584e-08
d
yr
n .1876626737523328 1.6378e-09 deg/d
Q 3.355508291025905 1.9524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1677  
   data-arc span      13172 days (36.06 yr)  
   first obs. used      1983-11-04  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45543  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:09:31  

Additional Information
 Earth MOID = 1.72698 au 
 Jupiter MOID = 1.8223 au 
 T_jup = 3.213 
[ 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 12.5   n/a MPO416928  
rotation period rot_per 3.601296 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]

20725 (1999 XP120)          Discovered 1999-Dec-05 by CSS at Catalina
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XP120 = 1983 VL7 = 1988 VZ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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