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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1524415675580331 3.5835e-08  
a 3.221490431774989 1.6174e-08 au
q 2.730401380482005 1.1225e-07 au
i 8.567555072898292 3.697e-06 deg
node 344.2199737538691 2.8028e-05 deg
peri 70.00525620934832 3.1613e-05 deg
M 279.5852739928782 1.5635e-05 deg
tp 2459672.255292717301
(2022-Apr-02.75529272)
9.3673e-05 TDB
period 2111.950308245624
5.78
1.5905e-05
4.355e-08
d
yr
n .1704585560533612 1.2838e-09 deg/d
Q 3.712579483067973 1.864e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3653  
   data-arc span      47034 days (128.77 yr)  
   first obs. used      1892-03-04  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35063  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:42:26  

Additional Information
 Earth MOID = 1.75558 au 
 Jupiter MOID = 1.77769 au 
 T_jup = 3.153 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455617.5 (2011-Feb-25.0) TDB
Reference: JPL 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1604221991820255 3.6631e-08  
q 2.693546481904733 1.1701e-07 au
tp 2455454.257587193993
(2010-Sep-14.75758719)
7.2524e-05 TDB
node 344.9252945305177 2.8165e-05 deg
peri 68.13041934423684 3.1172e-05 deg
i 8.559500400489139 3.698e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3653  
   data-arc span      47034 days (128.77 yr)  
   first obs. used      1892-03-04  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35063  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:42:26  

Additional Information
 Jupiter MOID = 1.77769 au 
 T_jup = 3.153 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.341832979104235E-15 -4.265638558984884E-15 -2.306301048803203E-13 1.048441242361358E-14 -5.308981839461211E-14 -2.156267160088847E-15
q -4.265638558984884E-15 1.369246102687977E-14 1.086760770699521E-12 -3.767900121410554E-14 2.353920936155895E-13 5.987565077979831E-15
tp -2.306301048803203E-13 1.086760770699521E-12 5.259757484127129E-9 -7.357313776051258E-12 9.950147131359858E-10 2.097929350926556E-12
node 1.048441242361358E-14 -3.767900121410554E-14 -7.357313776051258E-12 7.932752745553662E-10 -7.858086846693325E-10 1.243933148652891E-11
peri -5.308981839461211E-14 2.353920936155895E-13 9.950147131359858E-10 -7.858086846693325E-10 9.716730225031968E-10 -1.205734131058085E-11
i -2.156267160088847E-15 5.987565077979831E-15 2.097929350926556E-12 1.243933148652891E-11 -1.205734131058085E-11 1.367533025958303E-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 8.84   n/a E2021B10 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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