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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

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