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17 Thetis (A852 HA)
Classification: Main-belt Asteroid          SPK-ID: 2000017
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1333227447023434 2.6316e-08  
a 2.470964688686002 3.0678e-09 au
q 2.141528894327813 6.4849e-08 au
i 5.592660718860978 2.8698e-06 deg
node 125.5396833138738 2.5786e-05 deg
peri 135.974134971005 2.7265e-05 deg
M 45.07427507788044 9.7002e-06 deg
tp 2458822.866658449915
(2019-Dec-05.36665845)
3.8096e-05 TDB
period 1418.725045439768
3.88
2.6421e-06
7.234e-09
d
yr
n .2537489566122442 4.7256e-10 deg/d
Q 2.800400483044191 3.4768e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3824  
   data-arc span      61571 days (168.57 yr)  
   first obs. used      1852-04-17  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54839  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:50:24  

Additional Information
 Earth MOID = 1.13008 au 
 Jupiter MOID = 2.2735 au 
 T_jup = 3.465 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452814.5 (2003-Jun-24.0) TDB
Reference: JPL 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1341482839042043 2.6588e-08  
q 2.139468376042384 6.5516e-08 au
tp 2453148.501695971085
(2004-May-23.00169597)
3.4827e-05 TDB
node 125.6264363524022 2.5827e-05 deg
peri 135.705077724242 2.7249e-05 deg
i 5.587354316710345 2.8699e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3824  
   data-arc span      61571 days (168.57 yr)  
   first obs. used      1852-04-17  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54839  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:50:24  

Additional Information
 Jupiter MOID = 2.2735 au 
 T_jup = 3.465 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.069150187210471E-16 -1.74059473508863E-15 1.623077096652668E-13 -6.10688799779905E-15 4.741284203898736E-14 -5.543041626958298E-16
q -1.74059473508863E-15 4.29233463318498E-15 -3.891093640287569E-13 1.422129682130991E-14 -1.138239083605556E-13 1.464290301612316E-15
tp 1.623077096652668E-13 -3.891093640287569E-13 1.212952025258644E-9 -5.701734610344296E-13 3.089641787042055E-10 -1.086557631549448E-12
node -6.10688799779905E-15 1.422129682130991E-14 -5.701734610344296E-13 6.670346973599016E-10 -6.637222987670657E-10 -1.678266126693834E-11
peri 4.741284203898736E-14 -1.138239083605556E-13 3.089641787042055E-10 -6.637222987670657E-10 7.425140704696815E-10 1.64305964399581E-11
i -5.543041626958298E-16 1.464290301612316E-15 -1.086557631549448E-12 -1.678266126693834E-11 1.64305964399581E-11 8.236503307357647E-12

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 7.7   n/a MPO492748 IRAS observations used: 10
diameter diameter 84.899 km 2.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.27048 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic)
Published Reference List:
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 200-220.]
[Michalowski, T.; Velichko, F.P.; Di Martino, M.; Krugly, et al. (1995) Icarus 118, 292-301.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.193   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.829   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=25; phase (min.=.64, mean=7.44, max.=23.88) deg.
U-B UB 0.438   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=23; phase (min.=.64, mean=7.45, max.=23.88) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sl   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)

17 Thetis (A852 HA)          Discovered 1852-Apr-17 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A852 HA = 1954 SO1 = A913 CA = A916 YF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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