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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1356518870231353 3.1459e-08  
a 3.137190152211217 1.3701e-08 au
q 2.711624388113369 9.5032e-08 au
i 2.304153003317473 3.9838e-06 deg
node 67.02377591600802 9.4922e-05 deg
peri 33.88485790544412 9.6217e-05 deg
M 187.1439691647948 1.6129e-05 deg
tp 2459975.022177868430
(2023-Jan-30.52217787)
9.2057e-05 TDB
period 2029.596435470058
5.56
1.3296e-05
3.64e-08
d
yr
n .1773751637066821 1.162e-09 deg/d
Q 3.562755916309066 1.556e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2889  
   data-arc span      41442 days (113.46 yr)  
   first obs. used      1906-11-11  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42678  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:09:21  

Additional Information
 Earth MOID = 1.7289 au 
 Jupiter MOID = 1.58883 au 
 T_jup = 3.196 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456188.5 (2012-Sep-18.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1389683264800129 3.2054e-08  
q 2.690227126367299 9.7955e-08 au
tp 2455916.262118839069
(2011-Dec-20.76211884)
8.4654e-05 TDB
node 67.11749180031097 9.4298e-05 deg
peri 31.53730114739203 9.5544e-05 deg
i 2.315544769386622 4.005e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2889  
   data-arc span      41442 days (113.46 yr)  
   first obs. used      1906-11-11  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42678  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:09:21  

Additional Information
 Jupiter MOID = 1.58883 au 
 T_jup = 3.196 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.027432916034064E-15 -3.121592472153769E-15 -3.897565384539206E-13 -1.107796567199367E-15 -7.75886958383485E-14 3.841351877212179E-17
q -3.121592472153769E-15 9.595245861007548E-15 1.265520419864204E-12 6.811565771043298E-15 2.478440874870024E-13 -3.075618598128403E-16
tp -3.897565384539206E-13 1.265520419864204E-12 7.166367872662723E-9 -1.463940125711454E-12 1.325236892102805E-9 -1.865097050510751E-13
node -1.107796567199367E-15 6.811565771043298E-15 -1.463940125711454E-12 8.892099725487484E-9 -8.88431455352877E-9 -7.274390927896696E-11
peri -7.75886958383485E-14 2.478440874870024E-13 1.325236892102805E-9 -8.88431455352877E-9 9.128564318401277E-9 7.26198195610989E-11
i 3.841351877212179E-17 -3.075618598128403E-16 -1.865097050510751E-13 -7.274390927896696E-11 7.26198195610989E-11 1.604042500698365E-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 11.0   n/a MPO492756 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. 2019-August); 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.]
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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