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458 Hercynia (A900 SD)
Classification: Main-belt Asteroid          SPK-ID: 2000458
[ 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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2419427115584478 3.2069e-08  
a 2.993537307801609 8.7358e-09 au
q 2.269272774400712 9.7783e-08 au
i 12.65409829223988 3.5543e-06 deg
node 134.1375624429589 1.7239e-05 deg
peri 277.1766632754395 1.8806e-05 deg
M 8.38808557782237 8.304e-06 deg
tp 2458956.420588133121
(2020-Apr-16.92058813)		 4.3538e-05 TDB
period 1891.800950866815
5.18		 8.2811e-06
2.267e-08		 d
yr
n .1902948615365953 8.3299e-10 deg/d
Q 3.717801841202506 1.0849e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2811  
   data-arc span      43886 days (120.15 yr)  
   first obs. used      1900-09-21  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41558  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:53:48  

Additional Information
 Earth MOID = 1.32155 au 
 Jupiter MOID = 1.86647 au 
 T_jup = 3.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455922.5 (2011-Dec-27.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .237389694058813 3.1614e-08  
q 2.286853553406925 9.5806e-08 au
tp 2455158.893263042562
(2009-Nov-23.39326304)		 3.9194e-05 TDB
node 134.568543339764 1.7172e-05 deg
peri 275.8989843900221 1.8916e-05 deg
i 12.66773504796401 3.5568e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2811  
   data-arc span      43886 days (120.15 yr)  
   first obs. used      1900-09-21  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41558  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:53:48  

Additional Information
 Jupiter MOID = 1.86647 au 
 T_jup = 3.174 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.994225215187076E-16 -3.021484867301551E-15 4.841634341297361E-14 -6.604059826941693E-15 6.320907053263617E-15 -2.374517145045046E-16
q -3.021484867301551E-15 9.178756110768644E-15 -9.171263599101787E-14 1.904599755731422E-14 -6.55161615254379E-15 6.140104860547579E-16
tp 4.841634341297361E-14 -9.171263599101787E-14 1.536136725366762E-9 -1.274591453300142E-11 3.324177460823562E-10 -2.179026169166712E-12
node -6.604059826941693E-15 1.904599755731422E-14 -1.274591453300142E-11 2.948644764755058E-10 -2.897772298397107E-10 -4.174833569618287E-12
peri 6.320907053263617E-15 -6.55161615254379E-15 3.324177460823562E-10 -2.897772298397107E-10 3.578329874328248E-10 3.534510149499795E-12
i -2.374517145045046E-16 6.140104860547579E-16 -2.179026169166712E-12 -4.174833569618287E-12 3.534510149499795E-12 1.265065608980993E-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 9.6   n/a MPO502157 IRAS observations used: 8
diameter diameter 36.698 km 0.408 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 21.806 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Aznar, A.M.; Carreno Garcerain, A.; Arce Masego, E.; Brines Rodriques, P.; et al. (2016) Minor Planet Bull. 43, 257-263.]
[Devogele, M.; Tanga, P.; Bendjoya, P.; Rivet, J.P.; et al. (2017) ArXiv:1707.07503.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.191   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.885   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.21 deg.
U-B UB 0.471   0.051 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.21 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B L   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

458 Hercynia (A900 SD)          Discovered 1900-Sep-21 by Wolf, M. and Schwassmann, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A900 SD = 1947 XB = 2016 FW5 = A902 CA = A915 PD 
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