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187828 (1999 VX21)
Classification: Mars-crossing Asteroid          SPK-ID: 2187828
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2477442757942301 6.4348e-08  
a 2.183522978692398 5.97e-09 au
q 1.64256765965619 1.4065e-07 au
i 3.563935072287435 5.8726e-06 deg
node 208.9287965131119 5.8135e-05 deg
peri 161.6133984359556 5.8966e-05 deg
M 219.0697977649501 7.7647e-06 deg
tp 2459661.856507981360
(2022-Mar-23.35650798)
2.6245e-05 TDB
period 1178.514897724191
3.23
4.8333e-06
1.323e-08
d
yr
n .3054691974579103 1.2528e-09 deg/d
Q 2.724478297728607 7.4491e-09 au
  Orbit Determination Parameters
   # obs. used (total)      478  
   data-arc span      7471 days (20.45 yr)  
   first obs. used      1999-10-12  
   last obs. used      2020-03-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52537  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:57:00  

Additional Information
 Earth MOID = .641478 au 
 Jupiter MOID = 2.7443 au 
 T_jup = 3.636 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.14   n/a E2021B55  

187828 (1999 VX21)          Discovered 1999-Nov-12 by Korlevic, K. at Visnjan
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

Alternate Designations
 1999 VX21 = 2002 QT14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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