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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1356518864299347 3.1484e-08  
a 3.137190151965062 1.3738e-08 au
q 2.711624389761588 9.5084e-08 au
i 2.304153035168671 3.9931e-06 deg
node 67.02377778005841 9.5297e-05 deg
peri 33.88485674150197 9.6603e-05 deg
M 187.1439685664736 1.6185e-05 deg
tp 2459975.022181126930
(2023-Jan-30.52218113)
9.233e-05 TDB
period 2029.596435231184
5.56
1.3331e-05
3.65e-08
d
yr
n .1773751637275583 1.1651e-09 deg/d
Q 3.562755914168537 1.5601e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2859  
   data-arc span      41216 days (112.84 yr)  
   first obs. used      1906-11-11  
   last obs. used      2019-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42804  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:32:23  

Additional Information
 Earth MOID = 1.7289 au 
 Jupiter MOID = 1.58883 au 
 T_jup = 3.196 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456169.5 (2012-Aug-30.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1389589194339474 3.2091e-08  
q 2.69018726002485 9.8047e-08 au
tp 2455916.222340791447
(2011-Dec-20.72234079)
8.5048e-05 TDB
node 67.11743842636329 9.4671e-05 deg
peri 31.52784383607203 9.5927e-05 deg
i 2.315544880043335 4.0146e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2859  
   data-arc span      41216 days (112.84 yr)  
   first obs. used      1906-11-11  
   last obs. used      2019-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42804  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:32:23  

Additional Information
 Jupiter MOID = 1.58883 au 
 T_jup = 3.196 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.029825480629171E-15 -3.128130343209451E-15 -4.023894074917232E-13 -1.175521050375555E-15 -8.014363388100012E-14 4.041320495074092E-17
q -3.128130343209451E-15 9.613162740276076E-15 1.299965477718003E-12 7.067407080980107E-15 2.54723883878198E-13 -3.15689075689597E-16
tp -4.023894074917232E-13 1.299965477718003E-12 7.233137839092822E-9 -1.58493635757332E-12 1.33921434139157E-9 -1.820730481639072E-13
node -1.175521050375555E-15 7.067407080980107E-15 -1.58493635757332E-12 8.962641613491002E-9 -8.954815160159654E-9 -7.505601607568254E-11
peri -8.014363388100012E-14 2.54723883878198E-13 1.33921434139157E-9 -8.954815160159654E-9 9.201897718880254E-9 7.493066404591164E-11
i 4.041320495074092E-17 -3.15689075689597E-16 -1.820730481639072E-13 -7.505601607568254E-11 7.493066404591164E-11 1.611663560293437E-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

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