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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1535897231689551 3.7027e-08  
a 3.224122756928031 1.5135e-08 au
q 2.728930635228727 1.1676e-07 au
i 8.548029031111641 3.731e-06 deg
node 344.3566878329908 2.8593e-05 deg
peri 69.49692605147224 3.2008e-05 deg
M 246.0539976689539 1.5304e-05 deg
tp 2459669.786974033540
(2022-Mar-31.28697403)
9.2763e-05 TDB
period 2114.539393423075
5.79
1.4889e-05
4.076e-08
d
yr
n .170249843119367 1.1988e-09 deg/d
Q 3.719314878627336 1.7459e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3514  
   data-arc span      46952 days (128.55 yr)  
   first obs. used      1892-03-04  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35658  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:25:42  

Additional Information
 Earth MOID = 1.75466 au 
 Jupiter MOID = 1.77455 au 
 T_jup = 3.152 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455506.5 (2010-Nov-06.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1605064309283616 3.75e-08  
q 2.69346805699194 1.1946e-07 au
tp 2455454.165518232352
(2010-Sep-14.66551823)
7.2797e-05 TDB
node 344.9252736801031 2.8616e-05 deg
peri 68.10699625640352 3.161e-05 deg
i 8.559496743716448 3.7399e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3514  
   data-arc span      46952 days (128.55 yr)  
   first obs. used      1892-03-04  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35658  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:25:42  

Additional Information
 Jupiter MOID = 1.77455 au 
 T_jup = 3.152 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.406263808585565E-15 -4.458376089415667E-15 -2.695887725752499E-13 1.100366078641872E-14 -6.466094325584891E-14 -2.341883701783376E-15
q -4.458376089415667E-15 1.427048155346237E-14 1.207303505132592E-12 -3.943248320489657E-14 2.706942659240206E-13 6.504743003104176E-15
tp -2.695887725752499E-13 1.207303505132592E-12 5.299333751236533E-9 -6.714948635572881E-12 1.004584498460578E-9 2.295188308029323E-12
node 1.100366078641872E-14 -3.943248320489657E-14 -6.714948635572881E-12 8.188566611743793E-10 -8.110430567330486E-10 1.492911669613984E-11
peri -6.466094325584891E-14 2.706942659240206E-13 1.004584498460578E-9 -8.110430567330486E-10 9.992226277100832E-10 -1.447706783433409E-11
i -2.341883701783376E-15 6.504743003104176E-15 2.295188308029323E-12 1.492911669613984E-11 -1.447706783433409E-11 1.398706179803141E-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 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. 2019-August); 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]
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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Alternate Designations
 A892 EA = 1949 HQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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