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325 Heidelberga (A892 EA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000325
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 69 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1535897216516402 3.624e-08  
a 3.224122756554922 1.4919e-08 au
q 2.728930639804932 1.146e-07 au
i 8.548028904988977 3.6983e-06 deg
node 344.3566865216927 2.819e-05 deg
peri 69.4969276911651 3.1618e-05 deg
M 246.0539975388224 1.5297e-05 deg
tp 2459669.786974681717
(2022-Mar-31.28697468)
9.274e-05 TDB
period 2114.539393056019
5.79
1.4677e-05
4.018e-08
d
yr
n .1702498431489201 1.1817e-09 deg/d
Q 3.719314873304911 1.7211e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3622  
   data-arc span      47008 days (128.70 yr)  
   first obs. used      1892-03-04  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35199  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:44  

Additional Information
 Earth MOID = 1.75466 au 
 Jupiter MOID = 1.77455 au 
 T_jup = 3.152 
[ show covariance matrix ]

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 8.7   n/a MPO492752 IRAS observations used: 18
diameter diameter 75.72 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
rotation period rot_per 6.737 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.1068   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
B-V BV 0.714   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.99 deg.
U-B UB 0.268   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.99 deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

325 Heidelberga (A892 EA)          Discovered 1892-Mar-04 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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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
2009-Apr-21 23:19 < 00:01 Jupiter 1.85787127898556 1.85787082770836 1.85787173026276 3.71196316536736 3.58703918125101 2454943.471866653 0.225710315703189 61.6951306316648 18.2112294416111 84.3430585034522 3264915.29369682 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52
2020-Jun-07 21:28 < 00:01 Jupiter 1.78316998246891 1.78316953044492 1.78317043449291 2.79876607241147 2.62356107499761 2459008.394286548 0.326646034220038 58.8530961735931 15.302744736735 78.397466856596 2889622.13380141 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52
2031-Aug-02 15:44 < 00:01 Jupiter 1.77290746915581 1.77290699754519 1.77290794076633 2.0249606298975 1.77339999275414 2463081.155478578 0.576579962856474 53.7096789105054 28.1554702847299 61.3836108763582 2460020.1434375 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52
2042-Sep-27 13:57 < 00:01 Jupiter 1.81191686778054 1.81191636266004 1.81191737290074 1.68264695738245 1.37708186030294 2467155.081258893 0.887393879377382 66.4489025108682 37.8235687257199 81.3706612671998 2663861.56067828 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52
2053-Nov-23 00:37 00:01 Jupiter 1.8812074903018 1.88120693127967 1.88120804932414 2.05198913005299 1.81938175986445 2471229.525361953 1.18529680586886 58.2937945745633 28.3369567525931 81.9607040909332 1957923.84292733 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52
2065-Jan-18 18:05 00:01 Jupiter 1.9788009639725 1.97880032629235 1.97880160165354 2.83059493318196 2.67510204426878 2475304.253314460 1.44249465007787 94.068750962463 15.6315666253129 82.6276918340411 2683710.93168397 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52
2175-Dec-04 14:08 00:03 Jupiter 1.87886154648481 1.87886026532737 1.87886282764374 4.04804508977657 3.93510295575552 2515800.089034271 3.12097081704439 123.854634597304 30.9735883318216 67.7636957068407 1991540.81728325 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52
2187-Jan-17 13:10 00:03 Jupiter 1.7497397787901 1.74973908546548 1.74974047211462 3.24413355016594 3.09131570600964 2519862.048283610 3.1190431809651 86.810452582317 20.2128473394455 89.1530113154541 1524510.16401166 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52
2198-Mar-19 19:41 00:03 Jupiter 1.71400061043401 1.71400012771834 1.71400109315055 2.5270927733664 2.32332532715771 2523941.319879216 3.26130116470955 144.416816692874 16.9702257001903 69.6759991401057 2335840.04246377 T 69 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:53 2020-Dec-18 01:52

Alternate Designations
 A892 EA = 1949 HQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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