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JPL Small-Body Database Browser
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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 82 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2419427053034912 3.2856e-08  
a 2.993537310586944 9.1289e-09 au
q 2.269272795236601 1.0053e-07 au
i 12.65409846947091 3.5687e-06 deg
node 134.1375634350912 1.7503e-05 deg
peri 277.176663171582 1.9046e-05 deg
M 8.388083520894799 8.5122e-06 deg
tp 2458956.420598880760
(2020-Apr-16.92059888)		 4.4622e-05 TDB
period 1891.800953507153
5.18		 8.6536e-06
2.369e-08		 d
yr
n .1902948612710057 8.7046e-10 deg/d
Q 3.717801825937287 1.1338e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2602  
   data-arc span      43599 days (119.37 yr)  
   first obs. used      1900-09-21  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42685  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:27:50  

Additional Information
 Earth MOID = 1.32155 au 
 Jupiter MOID = 1.86647 au 
 T_jup = 3.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455791.5 (2011-Aug-18.0) TDB
Reference: JPL 82 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2373747241750574 3.2388e-08  
q 2.286741136618676 9.8495e-08 au
tp 2455158.736775688956
(2009-Nov-23.23677569)		 3.9504e-05 TDB
node 134.5769403860897 1.7431e-05 deg
peri 275.8616256934974 1.915e-05 deg
i 12.66858895783505 3.5716e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2602  
   data-arc span      43599 days (119.37 yr)  
   first obs. used      1900-09-21  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42685  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:27:50  

Additional Information
 Jupiter MOID = 1.86647 au 
 T_jup = 3.174 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.048955753910277E-15 -3.182278269602458E-15 1.836256210779073E-14 -6.726833408295E-15 2.146441297880715E-15 -3.690551017046195E-16
q -3.182278269602458E-15 9.701250973510845E-15 8.170612571539866E-15 1.961437100144889E-14 7.298625903087675E-15 1.063170294776755E-15
tp 1.836256210779073E-14 8.170612571539866E-15 1.560550499956557E-9 -1.215233788723193E-11 3.355830041378709E-10 -2.048138509451153E-12
node -6.726833408295E-15 1.961437100144889E-14 -1.215233788723193E-11 3.038565848681431E-10 -2.984139527414745E-10 -3.365087081463039E-12
peri 2.146441297880715E-15 7.298625903087675E-15 3.355830041378709E-10 -2.984139527414745E-10 3.66725703131423E-10 2.766596756580387E-12
i -3.690551017046195E-16 1.063170294776755E-15 -2.048138509451153E-12 -3.365087081463039E-12 2.766596756580387E-12 1.275649700749975E-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. 2019-August); 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 Macias, A.; 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

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Alternate Designations
 A900 SD = 1947 XB = 2016 FW5 = A902 CA = A915 PD 
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