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295 Theresia (A890 QA)
Classification: Main-belt Asteroid          SPK-ID: 2000295
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702217046716159 3.5656e-08  
a 2.797378849172009 9.397e-09 au
q 2.321204252853627 9.9494e-08 au
i 2.708384084770748 4.0318e-06 deg
node 276.03457194212 8.334e-05 deg
peri 147.9495615727301 8.4137e-05 deg
M 202.0912254150015 1.2869e-05 deg
tp 2459750.099209227105
(2022-Jun-19.59920923)
6.3198e-05 TDB
period 1708.934263032362
4.68
8.611e-06
2.358e-08
d
yr
n .2106576056127577 1.0615e-09 deg/d
Q 3.273553445490392 1.0997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2774  
   data-arc span      44283 days (121.24 yr)  
   first obs. used      1899-07-11  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44202  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:31:11  

Additional Information
 Earth MOID = 1.33517 au 
 Jupiter MOID = 2.04224 au 
 T_jup = 3.304 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456013.5 (2012-Mar-27.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1720734692141651 3.5836e-08  
q 2.313182485186337 1.0006e-07 au
tp 2456338.785895681111
(2013-Feb-15.28589568)
5.4638e-05 TDB
node 276.0812260871764 8.3434e-05 deg
peri 148.5787414399907 8.4204e-05 deg
i 2.707969761159846 4.0321e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2774  
   data-arc span      44283 days (121.24 yr)  
   first obs. used      1899-07-11  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44202  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:31:11  

Additional Information
 Jupiter MOID = 2.04224 au 
 T_jup = 3.304 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.284251426772785E-15 -3.574555835032655E-15 3.00726162917075E-14 -4.978108912383594E-15 6.76101275544902E-15 -1.500432905446801E-16
q -3.574555835032655E-15 1.001178742591234E-14 3.196919723543706E-14 1.585882936088444E-14 -1.717631735977164E-15 5.446641247321256E-16
tp 3.00726162917075E-14 3.196919723543706E-14 2.985340151249948E-9 -7.777886544791555E-12 6.387745438120448E-10 -2.338473945509202E-13
node -4.978108912383594E-15 1.585882936088444E-14 -7.777886544791555E-12 6.961164874633161E-9 -6.954506631011695E-9 -1.546175471555429E-11
peri 6.76101275544902E-15 -1.717631735977164E-15 6.387745438120448E-10 -6.954506631011695E-9 7.090245026783084E-9 1.53989940089285E-11
i -1.500432905446801E-16 5.446641247321256E-16 -2.338473945509202E-13 -1.546175471555429E-11 1.53989940089285E-11 1.625753781592216E-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 10.0   n/a MPO473764 IRAS observations used: 3
diameter diameter 28.340 km 0.338 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.702 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Menke, J. (2005) Minor Planet Bull. 32, 85-88.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pligge, Z.; Monnier, A.; Pharo, J.; Stolze, K.; Yim, A.; Ditteon, R. (2011) Minor Planet Bull. 38, 5-7.]
[Pilcher, F. (2018) Minor Planet Bull. 45, 181-182.]
geometric albedo albedo 0.171   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.862   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.44, mean=1.93, max.=2.41) deg.
U-B UB 0.501   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.44, mean=1.93, max.=2.41) 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 S   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)

295 Theresia (A890 QA)          Discovered 1890-Aug-17 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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