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21894 (1999 VQ4)
Classification: Main-belt Asteroid          SPK-ID: 2021894
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0509128463559949 3.2431e-08  
a 2.582212596814797 9.293e-09 au
q 2.450744803614651 8.6536e-08 au
i 14.94653821449583 3.301e-06 deg
node 172.871899201092 1.2512e-05 deg
peri 296.5616928277975 3.3364e-05 deg
M 26.9207277659937 3.076e-05 deg
tp 2459283.163260261199
(2021-Mar-09.66326026)
0.00012951 TDB
period 1515.606363268851
4.15
8.1817e-06
2.24e-08
d
yr
n .2375286939436927 1.2822e-09 deg/d
Q 2.713680390014943 9.7661e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1860  
   data-arc span      11218 days (30.71 yr)  
   first obs. used      1990-07-24  
   last obs. used      2021-04-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4743  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:37:30  

Additional Information
 Earth MOID = 1.49725 au 
 Jupiter MOID = 2.33196 au 
 T_jup = 3.375 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457440.5 (2016-Feb-22.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0493490391409395 3.2292e-08  
q 2.454555320536109 8.5992e-08 au
tp 2457765.511846880376
(2017-Jan-12.01184688)
0.00013474 TDB
node 172.9577800085274 1.2498e-05 deg
peri 295.9574849863774 3.4457e-05 deg
i 14.95474171593324 3.3025e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1860  
   data-arc span      11218 days (30.71 yr)  
   first obs. used      1990-07-24  
   last obs. used      2021-04-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4743  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:37:30  

Additional Information
 Jupiter MOID = 2.33196 au 
 T_jup = 3.375 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.042755110084434E-15 -2.763211200619469E-15 2.873829053323869E-13 -7.024415717190713E-15 1.009548234151653E-13 -2.79349872507465E-15
q -2.763211200619469E-15 7.394639245435957E-15 -8.269114598999506E-13 1.846378315772213E-14 -2.865553532539706E-13 7.928637103599888E-15
tp 2.873829053323869E-13 -8.269114598999506E-13 1.815475073931069E-8 9.463735491452602E-12 4.335865633835581E-9 -4.768578973018203E-13
node -7.024415717190713E-15 1.846378315772213E-14 9.463735491452602E-12 1.561949956947347E-10 -1.484584990699054E-10 -3.636758678289428E-12
peri 1.009548234151653E-13 -2.865553532539706E-13 4.335865633835581E-9 -1.484584990699054E-10 1.187252102187242E-9 3.247587852244685E-12
i -2.79349872507465E-15 7.928637103599888E-15 -4.768578973018203E-13 -3.636758678289428E-12 3.247587852244685E-12 1.090672342017043E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.12   n/a MPCxxxxx  
diameter diameter 4.403 km 0.306 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.251   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21894 (1999 VQ4)          Discovered 1999-Nov-01 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VQ4 = 2000 CZ65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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