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279 Thule (A888 UA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000279
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04251975597899151 3.1895e-08  
a 4.272880796501354 2.865e-08 au
q 4.091198947706797 1.5022e-07 au
i 2.334382766312102 3.4623e-06 deg
node 71.92000131228096 9.6171e-05 deg
peri 24.48354087863148 0.00010594 deg
M 235.0558010988099 4.6504e-05 deg
tp 2460120.178112552835
(2023-Jun-24.67811255)
0.00042276 TDB
period 3226.113129412215
8.83
3.2447e-05
8.884e-08
d
yr
n .1115893911834365 1.1223e-09 deg/d
Q 4.45456264529591 2.9868e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3063  
   data-arc span      47350 days (129.64 yr)  
   first obs. used      1890-12-12  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45357  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:13:24  

Additional Information
 Earth MOID = 3.10819 au 
 Jupiter MOID = .64929 au 
 T_jup = 3.027 
[ 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-August); 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 (A888 UA)          Discovered 1888-Oct-25 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A888 UA = 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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