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21594 (1998 VP31)
Classification: Main-belt Asteroid          SPK-ID: 2021594
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2138810055919765 2.1704e-08  
a 2.739030418363445 9.8875e-09 au
q 2.15320383813686 5.8753e-08 au
i 8.231589213629375 3.7765e-07 deg
node 242.8877276190594 6.3573e-06 deg
peri 351.3483680271695 9.75e-06 deg
M 107.9796891763896 5.2158e-06 deg
tp 2458703.869620772391
(2019-Aug-08.36962077)
2.2658e-05 TDB
period 1655.745982282677
4.53
8.9655e-06
2.455e-08
d
yr
n .2174246556248258 1.1773e-09 deg/d
Q 3.324856998590031 1.2002e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2198  
   data-arc span      12409 days (33.97 yr)  
   first obs. used      1987-02-22  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46661  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:49:40  

Additional Information
 Earth MOID = 1.1409 au 
 Jupiter MOID = 1.69003 au 
 T_jup = 3.303 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457470.5 (2016-Mar-23.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2128448813511884 2.1747e-08  
q 2.157700917722822 5.8874e-08 au
tp 2457046.670470254212
(2015-Jan-24.17047025)
2.0437e-05 TDB
node 242.9287851088494 6.3549e-06 deg
peri 351.4484326357215 9.7674e-06 deg
i 8.230957314689466 3.7772e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2198  
   data-arc span      12409 days (33.97 yr)  
   first obs. used      1987-02-22  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46661  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:49:40  

Additional Information
 Jupiter MOID = 1.69003 au 
 T_jup = 3.303 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.729515046569933E-16 -1.269392028848882E-15 -1.886952735896138E-14 8.472149346057859E-15 -5.9449458004973E-14 5.261188234961462E-16
q -1.269392028848882E-15 3.466167842402563E-15 6.043239863700832E-14 -2.277812504638637E-14 1.646195837650017E-13 -1.392051538341959E-15
tp -1.886952735896138E-14 6.043239863700832E-14 4.176569431852872E-10 -3.194326547568763E-11 1.447293917122744E-10 -1.105368882067606E-12
node 8.472149346057859E-15 -2.277812504638637E-14 -3.194326547568763E-11 4.038479504750166E-11 -5.001895427830429E-11 -4.747557072127999E-13
peri -5.9449458004973E-14 1.646195837650017E-13 1.447293917122744E-10 -5.001895427830429E-11 9.540193616932031E-11 1.289713462829225E-13
i 5.261188234961462E-16 -1.392051538341959E-15 -1.105368882067606E-12 -4.747557072127999E-13 1.289713462829225E-13 1.42670289754401E-13

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 13.33   n/a MPCxxxxx  
diameter diameter 9.825 km 0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.5865 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:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 37, 152-158.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.118   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21594 (1998 VP31)          Discovered 1998-Nov-13 by Korlevic, K. at Visnjan
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 VP31 = 1987 DO1 = 1999 XU214 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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