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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 ]

[ show orbit diagram ]
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1925-Jul-13 15:42 00:01 Jupiter 1.99385939162425 1.99385880968861 1.99385997356135 3.6760073881639 3.55856701224904 2424345.154255422 1.0725360316961 117.803261388233 15.0586906421898 81.7742291265827 2807173.62365118 T 90 CATAB v2.0g-lin.ifort 2021-May-03 18:26:30 2021-May-03 18:26
1971-Mar-27 03:05 < 00:01 Jupiter 1.89212373819094 1.89212328305809 1.89212419332293 1.04342761175301 0.439803480929676 2441037.628456096 0.647113700758503 2389.72898893385 336.038970679628 9.8424403775294 1894037.45328893 T 90 CATAB v2.0g-lin.ifort 2021-May-03 18:26:30 2021-May-03 18:26
2008-Mar-27 13:02 < 00:01 Jupiter 1.9200183601321 1.92001796056213 1.92001875970206 3.13743663193724 2.99352667280245 2454553.042824001 0.20828640991414 61.9998672408917 14.7341600310174 82.793836959064 2850405.81096752 T 90 CATAB v2.0g-lin.ifort 2021-May-03 18:26:30 2021-May-03 18:26
2053-Nov-22 16:38 < 00:01 Jupiter 1.9272888611268 1.92728839901001 1.92728932341789 0.943637523370647 0.107114466721449 2471229.193120736 0.632197174532856 95137.9774229094 3182.56425664377 5.86798357889719 6067913.14133892 T 90 CATAB v2.0g-lin.ifort 2021-May-03 18:26:30 2021-May-03 18:26
2090-Dec-08 18:17 00:01 Jupiter 1.86972810921027 1.86972770384434 1.86972851457621 2.65583118835569 2.47939531692132 2484759.262068358 1.0110776042387 102.064963033084 21.9573275489536 -88.5173215619932 1913325.33473439 T 90 CATAB v2.0g-lin.ifort 2021-May-03 18:26:30 2021-May-03 18:26
2136-Jul-21 22:53 00:02 Jupiter 1.98321930482953 1.98321868135722 1.98321992830061 1.24384788456729 0.832447056790912 2501420.453297990 1.76550597134088 672.982325092008 93.1629472020054 -17.534981948732 1569232.93849115 T 90 CATAB v2.0g-lin.ifort 2021-May-03 18:26:30 2021-May-03 18:26
2173-Aug-19 18:15 00:02 Jupiter 1.84995195202695 1.849951536269 1.8499523677849 2.21778183271688 2.00070799029509 2514963.260746887 2.10487068876166 154.663857843162 53.1126675710638 -72.2230816930183 1252927.427579 T 90 CATAB v2.0g-lin.ifort 2021-May-03 18:26:30 2021-May-03 18:26

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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