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18647 Vaclavhubner (1998 FD2)
Classification: Main-belt Asteroid          SPK-ID: 2018647
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04394925453617564 8.5613e-08  
a 2.53820899833739 1.171e-08 au
q 2.426656605003449 2.1904e-07 au
i 3.719784288123981 5.7814e-06 deg
node 141.1423585090699 7.3029e-05 deg
peri 39.91593646404065 8.881e-05 deg
M 171.0457014598058 5.2084e-05 deg
tp 2458298.722953001421
(2018-Jun-29.22295300)
0.00021104 TDB
period 1477.03061090288
4.04
1.0221e-05
2.798e-08
d
yr
n .2437322539848644 1.6867e-09 deg/d
Q 2.649761391671332 1.2224e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1064  
   data-arc span      10202 days (27.93 yr)  
   first obs. used      1992-11-19  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56135  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:13:44  

Additional Information
 Earth MOID = 1.43073 au 
 Jupiter MOID = 2.30836 au 
 T_jup = 3.443 
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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 15.3   n/a MPO299097  
diameter diameter 2.727 km 0.644 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 33.10 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
geometric albedo albedo 0.198   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18647 Václavhübner           Discovered 1998 Mar. 21 by P. Pravec at Ondřejov.
Václav Hübner (1922-2000) was an enthusiastic amateur astronomer who contributed much to astronomical education and amateur astronomical activities in Pardubice and elsewhere in eastern Bohemia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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