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

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0100696234893993 5.1212e-08  
a 4.294561693869654 3.8009e-08 AU
q 4.251317074560389 2.3698e-07 AU
i 2.334374329670298 4.4586e-06 deg
node 73.62944624878806 0.00014726 deg
peri 53.42025486600831 0.0003049 deg
M 323.7267002430156 0.00026629 deg
tp 2457128.037673547560
(2015-Apr-15.53767355)
0.0024031 JED
period 3250.698537687284
8.90
4.3155e-05
1.182e-07
d
yr
n .1107454277369327 1.4702e-09 deg/d
Q 4.337806313178919 3.8392e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1535  
   data-arc span      45041 days (123.32 yr)  
   first obs. used      1890-12-13  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .6038  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:34:48  

Additional Information
 Earth MOID = 3.2667 AU 
 T_jup = 3.027 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.57 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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 15.962 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D.; Harris, A.W.; Coley, D.; Allen, B.; Higgins, D. (2010) Minor Planet Bul. 37, 168-169.]
geometric albedo albedo 0.0412   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
B-V BV .746 mag .049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=7.15, mean=11.21, max.=13.24) deg.
U-B UB .232 mag .044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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