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JPL Small-Body Database Browser
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295 Theresia
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702217045830894 3.6012e-08  
a 2.797378849094039 9.5145e-09 au
q 2.321204253036571 1.0033e-07 au
i 2.708384044714245 4.0416e-06 deg
node 276.0345766754186 8.8881e-05 deg
peri 147.9495571499214 8.9705e-05 deg
M 202.0912252241422 1.308e-05 deg
tp 2459750.099210101781
(2022-Jun-19.59921010)
6.4065e-05 TDB
period 1708.934262960913
4.68
8.7187e-06
2.387e-08
d
yr
n .2106576056215652 1.0747e-09 deg/d
Q 3.273553445151507 1.1134e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2557  
   data-arc span      44033 days (120.56 yr)  
   first obs. used      1899-07-11  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45841  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:23:29  

Additional Information
 Earth MOID = 1.33517 au 
 Jupiter MOID = 2.04224 au 
 T_jup = 3.304 
[ 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 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          Discovered 1890-Aug-17 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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