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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04316723868878847 1.9462e-08  
a 4.269397785077421 2.0679e-08 au
q 4.0850996718316 8.989e-08 au
i 2.334314280784432 6.5415e-07 deg
node 71.90014584177378 2.4376e-05 deg
peri 25.32113240259467 3.5166e-05 deg
M 256.6046621755577 1.9042e-05 deg
tp 2460125.936902419993
(2023-Jun-30.43690242)
0.00017309 TDB
period 3222.169315185894
8.82
2.341e-05
6.409e-08
d
yr
n .1117259724072665 8.1174e-10 deg/d
Q 4.453695898323243 2.1572e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3533  
   data-arc span      47521 days (130.11 yr)  
   first obs. used      1890-12-12  
   last obs. used      2021-01-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42983  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:10:21  

Additional Information
 Earth MOID = 3.10191 au 
 Jupiter MOID = .648552 au 
 T_jup = 3.027 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456135.5 (2012-Jul-27.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .00863782777215481 1.89e-08  
q 4.239643909168881 7.8276e-08 au
tp 2457340.416983997825
(2015-Nov-13.91698400)
0.0010495 TDB
node 73.62012310865734 2.5198e-05 deg
peri 77.43860837520305 0.00012262 deg
i 2.337870771199047 6.4815e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3533  
   data-arc span      47521 days (130.11 yr)  
   first obs. used      1890-12-12  
   last obs. used      2021-01-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42983  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:10:21  

Additional Information
 Jupiter MOID = .648552 au 
 T_jup = 3.027 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.572282471383516E-16 -1.427119585056943E-15 -6.587226172377804E-12 -7.605247265121412E-14 -6.556895912027815E-13 -1.538131184461336E-15
q -1.427119585056943E-15 6.127072611741637E-15 2.310707826574265E-11 2.864603890515705E-13 2.268691936324256E-12 5.69184035737398E-15
tp -6.587226172377804E-12 2.310707826574265E-11 1.101424720983582E-6 -1.928696969542674E-9 1.260522352067616E-7 -4.798926270265131E-11
node -7.605247265121412E-14 2.864603890515705E-13 -1.928696969542674E-9 6.349154589414656E-10 -8.408441513434032E-10 1.577533234752091E-11
peri -6.556895912027815E-13 2.268691936324256E-12 1.260522352067616E-7 -8.408441513434032E-10 1.503606942039162E-8 -2.091167798571756E-11
i -1.538131184461336E-15 5.69184035737398E-15 -4.798926270265131E-11 1.577533234752091E-11 -2.091167798571756E-11 4.200996031434783E-13

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

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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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