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21935 (1999 VZ77)
Classification: Main-belt Asteroid          SPK-ID: 2021935
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09232761855521945 1.4596e-08  
a 2.27519254201386 6.709e-09 au
q 2.065129432855124 3.3546e-08 au
i 6.269910393091779 6.6411e-07 deg
node 292.3363361374873 6.4327e-06 deg
peri 203.433893768901 1.1901e-05 deg
M 16.33525119252588 1.316e-05 deg
tp 2459339.621389754458
(2021-May-05.12138975)
4.5711e-05 TDB
period 1253.503814974335
3.43
5.5445e-06
1.518e-08
d
yr
n .2871949775496861 1.2703e-09 deg/d
Q 2.485255651172595 7.3285e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2314  
   data-arc span      16148 days (44.21 yr)  
   first obs. used      1977-02-25  
   last obs. used      2021-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44759  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:38:05  

Additional Information
 Earth MOID = 1.08158 au 
 Jupiter MOID = 2.55016 au 
 T_jup = 3.596 
[ 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 13.79   n/a MPCxxxxx  
diameter diameter 5.046 km 0.183 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 55.531 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.252   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21935 (1999 VZ77)          Discovered 1999-Nov-04 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VZ77 = 1992 SX23 = 1994 GJ11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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