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85516 Vaclik (1997 VF)
Classification: Main-belt Asteroid          SPK-ID: 2085516
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2445996191766192 6.2918e-08  
a 2.34863512724115 9.1675e-09 au
q 1.774159869533134 1.4452e-07 au
i 5.770370299182858 4.8759e-06 deg
node 60.30834958477843 4.3715e-05 deg
peri 310.3386024399704 4.4739e-05 deg
M 117.254381108452 1.0682e-05 deg
tp 2458572.298353414527
(2019-Mar-29.79835341)
3.7534e-05 TDB
period 1314.685142793854
3.60
7.6974e-06
2.107e-08
d
yr
n .273829823036533 1.6033e-09 deg/d
Q 2.923110384949165 1.141e-08 au
  Orbit Determination Parameters
   # obs. used (total)      598  
   data-arc span      8207 days (22.47 yr)  
   first obs. used      1997-10-29  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58289  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:37:21  

Additional Information
 Earth MOID = .781063 au 
 Jupiter MOID = 2.54878 au 
 T_jup = 3.512 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457184.5 (2015-Jun-11.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .245426963736545 6.329e-08  
q 1.771994902757952 1.4556e-07 au
tp 2457255.440153954841
(2015-Aug-20.94015396)
3.3293e-05 TDB
node 60.36813690900603 4.38e-05 deg
peri 309.8645234142223 4.4797e-05 deg
i 5.767014562319462 4.8712e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      598  
   data-arc span      8207 days (22.47 yr)  
   first obs. used      1997-10-29  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58289  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:37:21  

Additional Information
 Jupiter MOID = 2.54878 au 
 T_jup = 3.512 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.005632307020272E-15 -9.204725633219318E-15 6.842676838742289E-13 -4.747575289025301E-14 2.52674274956262E-14 -5.941336570185865E-15
q -9.204725633219318E-15 2.118872255329018E-14 -1.509147451127331E-12 1.083578901292198E-13 -4.122148854293318E-14 1.352854397248939E-14
tp 6.842676838742289E-13 -1.509147451127331E-12 1.108395897957517E-9 -1.007984182804619E-11 3.168579856068972E-10 -3.621097270520304E-12
node -4.747575289025301E-14 1.083578901292198E-13 -1.007984182804619E-11 1.918418858828692E-9 -1.908075541666977E-9 -2.90656468866665E-11
peri 2.52674274956262E-14 -4.122148854293318E-14 3.168579856068972E-10 -1.908075541666977E-9 2.006744197842527E-9 2.81691297097657E-11
i -5.941336570185865E-15 1.352854397248939E-14 -3.621097270520304E-12 -2.90656468866665E-11 2.81691297097657E-11 2.372890412657362E-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 16.4   n/a MPO453285  
diameter diameter 2.473 km 0.729 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.052   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85516 Vaclík           Discovered 1997 Nov. 2 by J. Ticha and M. Tichy at Klet.
František "Freddy" Vaclík (1942-2010) was an amateur astronomer interested in variable star visual observations and searching for moldavites. He actively took part in astronomical biking "Ebicykl" and served as the long-time chairman of the Czech Astronomical Society in Southern Bohemia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20101128/MPCPages.arcLast Updated: 2010-12-06

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