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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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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04351239449160568 1.9456e-08  
a 4.266985563822102 2.056e-08 au
q 4.081318804679088 9.0221e-08 au
i 2.334485902842245 6.5391e-07 deg
node 71.88639276119805 2.4376e-05 deg
peri 26.05758179066525 3.5025e-05 deg
M 277.8226306674202 1.89e-05 deg
tp 2460131.402831894522
(2023-Jul-05.90283189)
0.00017129 TDB
period 3219.43889942872
8.81
2.3269e-05
6.371e-08
d
yr
n .1118207275385413 8.082e-10 deg/d
Q 4.452652322965116 2.1455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3539  
   data-arc span      47670 days (130.51 yr)  
   first obs. used      1890-12-12  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42954  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:14:39  

Additional Information
 Earth MOID = 3.09853 au 
 Jupiter MOID = .647922 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 8.53   n/a E2021B10 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. 2020-October); 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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