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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1108943969996993 1.9254e-08  
a 3.022228846068754 1.3231e-08 au
q 2.687080600588863 6.0951e-08 au
i 10.19337668127005 2.7718e-07 deg
node 41.02461440835293 1.5951e-06 deg
peri 77.05641710389283 5.9195e-06 deg
M 311.9046782443121 4.3569e-06 deg
tp 2459456.883327784627
(2021-Aug-30.38332778)
2.3577e-05 TDB
period 1919.063947036602
5.25
1.2602e-05
3.45e-08
d
yr
n .1875914560095343 1.2319e-09 deg/d
Q 3.357377091548645 1.4698e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2247  
   data-arc span      13641 days (37.35 yr)  
   first obs. used      1983-11-04  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42551  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:28:37  

Additional Information
 Earth MOID = 1.72622 au 
 Jupiter MOID = 1.81952 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 12.62   n/a E2021B10  
rotation period rot_per 3.601296 h n/a LCDB (Rev. 2020-October); 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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