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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09231025184697049 1.4633e-08  
a 2.275099420351732 6.7102e-09 au
q 2.065084419882167 3.3603e-08 au
i 6.270242752542501 6.6454e-07 deg
node 292.3371448928958 6.4344e-06 deg
peri 203.4919324862045 1.1958e-05 deg
M 319.9938897861538 1.3157e-05 deg
tp 2459339.790925130624
(2021-May-05.29092513)
4.608e-05 TDB
period 1253.426858521965
3.43
5.5453e-06
1.518e-08
d
yr
n .2872126104147077 1.2707e-09 deg/d
Q 2.485114420821297 7.3296e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2271  
   data-arc span      16094 days (44.06 yr)  
   first obs. used      1977-02-25  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4482  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:16:57  

Additional Information
 Earth MOID = 1.08084 au 
 Jupiter MOID = 2.55066 au 
 T_jup = 3.596 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457101.5 (2015-Mar-20.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09160439059621883 1.4614e-08  
q 2.066436255491615 3.3521e-08 au
tp 2456832.185449181556
(2014-Jun-23.68544918)
4.27e-05 TDB
node 292.390339588861 6.441e-06 deg
peri 203.2565704973622 1.2055e-05 deg
i 6.266822661104031 6.6408e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2271  
   data-arc span      16094 days (44.06 yr)  
   first obs. used      1977-02-25  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4482  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:16:57  

Additional Information
 Jupiter MOID = 2.55066 au 
 T_jup = 3.596 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.13576850691688E-16 -4.816746244236901E-16 1.463189880276077E-13 -1.98016697925076E-14 3.954100700849645E-14 2.190306319349009E-15
q -4.816746244236901E-16 1.123677127115096E-15 -2.747274486104033E-13 4.478834938071359E-14 -7.158703304787203E-14 -5.092442189948232E-15
tp 1.463189880276077E-13 -2.747274486104033E-13 1.823314001873552E-9 4.948792923506983E-11 4.398873561955452E-10 -1.031109833648103E-11
node -1.98016697925076E-14 4.478834938071359E-14 4.948792923506983E-11 4.148636584577041E-11 -2.655930043054161E-11 -3.311360140106826E-12
peri 3.954100700849645E-14 -7.158703304787203E-14 4.398873561955452E-10 -2.655930043054161E-11 1.453218900855297E-10 3.81982657120763E-13
i 2.190306319349009E-15 -5.092442189948232E-15 -1.031109833648103E-11 -3.311360140106826E-12 3.81982657120763E-13 4.410028268460743E-13

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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