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621 Werdandi (A906 VM)
Classification: Main-belt Asteroid          SPK-ID: 2000621
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1361980162367081 3.0271e-08  
a 3.129161004990239 1.3636e-08 au
q 2.702975483625305 9.1837e-08 au
i 2.296991201989568 3.7358e-06 deg
node 66.68844590696162 9.0347e-05 deg
peri 35.91335679750635 9.1453e-05 deg
M 255.4518404544721 1.5474e-05 deg
tp 2459983.656918172065
(2023-Feb-08.15691817)
8.7571e-05 TDB
period 2021.809771313042
5.54
1.3216e-05
3.618e-08
d
yr
n .1780582946565749 1.1639e-09 deg/d
Q 3.555346526355173 1.5493e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3188  
   data-arc span      41865 days (114.62 yr)  
   first obs. used      1906-11-11  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41365  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:21:13  

Additional Information
 Earth MOID = 1.72052 au 
 Jupiter MOID = 1.58966 au 
 T_jup = 3.198 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456472.5 (2013-Jun-29.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .138987352522851 3.1033e-08  
q 2.691230580274309 9.5258e-08 au
tp 2455916.900841556154
(2011-Dec-21.40084156)
7.9079e-05 TDB
node 67.12197077271101 8.8979e-05 deg
peri 31.69325881378127 9.0087e-05 deg
i 2.315411056194287 3.7673e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3188  
   data-arc span      41865 days (114.62 yr)  
   first obs. used      1906-11-11  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41365  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:21:13  

Additional Information
 Jupiter MOID = 1.58966 au 
 T_jup = 3.198 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.630546828386835E-16 -2.94004653128645E-15 -2.057980518838643E-13 -2.229148673855613E-15 -3.833606942461195E-14 1.011015228249221E-16
q -2.94004653128645E-15 9.074171916238002E-15 7.743653134414921E-13 9.691314520544782E-15 1.431438217670515E-13 -4.798693961328313E-16
tp -2.057980518838643E-13 7.743653134414921E-13 6.253503614804756E-9 -1.852298633835103E-12 1.134621216416686E-9 -1.670740307739663E-13
node -2.229148673855613E-15 9.691314520544782E-15 -1.852298633835103E-12 7.917241662521892E-9 -7.910418454542086E-9 -3.961847006040548E-11
peri -3.833606942461195E-14 1.431438217670515E-13 1.134621216416686E-9 -7.910418454542086E-9 8.115651658155945E-9 3.952870324580228E-11
i 1.011015228249221E-16 -4.798693961328313E-16 -1.670740307739663E-13 -3.961847006040548E-11 3.952870324580228E-11 1.419267588594295E-11

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 11.10   n/a MPCxxxxx IRAS observations used: 9
diameter diameter 29.726 km 0.491 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 11.776 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Strabla, L.; Quadri, U.; Girelli, R.; Pilcher, F. (2012) Minor Planet Bull. 39, 154-155.]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.127   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.650   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=13.59, mean=13.59, max.=13.59) deg.
U-B UB 0.285   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=13.59, mean=13.59, max.=13.59) deg.
Tholen spectral type spec_T FCX:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

621 Werdandi (A906 VM)          Discovered 1906-Nov-11 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A906 VM = 1952 BO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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