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JPL Small-Body Database Browser
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279 Thule
Classification: Outer Main-belt Asteroid          SPK-ID: 2000279
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04013377479546391 3.3889e-08  
a 4.283402227463066 3.0225e-08 au
q 4.111493127107675 1.5617e-07 au
i 2.335777312180371 3.6768e-06 deg
node 71.96662832800817 9.6297e-05 deg
peri 23.16865852676496 0.00010773 deg
M 191.7157734461789 4.9619e-05 deg
tp 2460114.140098916930
(2023-Jun-18.64009892)		 0.00045271 TDB
period 3238.036307792757
8.87		 3.4273e-05
9.383e-08		 d
yr
n .111178493932762 1.1768e-09 deg/d
Q 4.455311327818458 3.1438e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2869  
   data-arc span      47074 days (128.88 yr)  
   first obs. used      1890-12-12  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46738  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:51:40  

Additional Information
 Earth MOID = 3.12849 au 
 Jupiter MOID = .648434 au 
 T_jup = 3.026 
[ 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 8.5   n/a MPO492751 IRAS observations used: 9
diameter diameter 126.59 km 3.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
rotation period rot_per 23.896 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Bartczak, P.; et al. (2016) Proc. Polish Ast. Soc. 123, 51-57.]
geometric albedo albedo 0.0412   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
B-V BV 0.746   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=7.15, mean=11.21, max.=13.24) deg.
U-B UB 0.232   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=9.92, mean=12.02, max.=13.24) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

279 Thule          Discovered 1888-Oct-25 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1927 EC = 1954 FF = A920 GA = A923 RA 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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