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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2421194476246994 2.9689e-08  
a 2.994167544689794 7.9103e-09 au
q 2.269221352673699 8.9642e-08 au
i 12.65436282518285 3.5497e-06 deg
node 134.1362241797371 1.5932e-05 deg
peri 277.1805919812485 1.7667e-05 deg
M 46.42846818435117 8.1184e-06 deg
tp 2458956.441223882173
(2020-Apr-16.94122388)
4.2213e-05 TDB
period 1892.398410680961
5.18
7.4993e-06
2.053e-08
d
yr
n .1902347824686967 7.5388e-10 deg/d
Q 3.71911373670589 9.8256e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3105  
   data-arc span      44011 days (120.50 yr)  
   first obs. used      1900-09-21  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39932  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:25:59  

Additional Information
 Earth MOID = 1.32076 au 
 Jupiter MOID = 1.86612 au 
 T_jup = 3.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456136.5 (2012-Jul-28.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2373712254401936 2.9283e-08  
q 2.287033835571232 8.7817e-08 au
tp 2457056.023150192360
(2015-Feb-02.52315019)
4.113e-05 TDB
node 134.5537215528301 1.5871e-05 deg
peri 275.954100095022 1.7799e-05 deg
i 12.66748647582619 3.5521e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3105  
   data-arc span      44011 days (120.50 yr)  
   first obs. used      1900-09-21  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39932  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:25:59  

Additional Information
 Jupiter MOID = 1.86612 au 
 T_jup = 3.174 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.574648753201836E-16 -2.565244096183458E-15 9.406508776510071E-14 -5.779091263024338E-15 8.226137411977043E-15 1.108482715966948E-16
q -2.565244096183458E-15 7.711830076543169E-15 -1.918983594848198E-13 1.644838836023939E-14 -1.304499565458055E-14 -5.143005620458813E-16
tp 9.406508776510071E-14 -1.918983594848198E-13 1.691644616563243E-9 -1.324188393892715E-11 3.454953205117227E-10 -2.612142221038663E-12
node -5.779091263024338E-15 1.644838836023939E-14 -1.324188393892715E-11 2.519026611156254E-10 -2.478442394295818E-10 -4.054484200953227E-12
peri 8.226137411977043E-15 -1.304499565458055E-14 3.454953205117227E-10 -2.478442394295818E-10 3.167973357234564E-10 3.391279666304001E-12
i 1.108482715966948E-16 -5.143005620458813E-16 -2.612142221038663E-12 -4.054484200953227E-12 3.391279666304001E-12 1.261769780884085E-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 9.70   n/a E2021B10 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

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Alternate Designations
 A900 SD = 1947 XB = 2016 FW5 = A902 CA = A915 PD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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