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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 
[ 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1912-Aug-12 01:14 00:02 Jupiter 1.21341363853924 1.21341334752014 1.21341392955827 2.31927364338226 1.99572835879757 2419626.551359100 1.89119799581454 17.2831336506032 7.60287017657932 -85.9429224878626 5629863.17408614 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11
1946-Nov-19 13:20 00:02 Jupiter 1.20609017213384 1.20608989947783 1.20609044478991 2.17549144854405 1.82433200951522 2432144.055885231 1.82634870326113 29.1448358289095 2.47528367410549 84.9127419207524 6078833.32415096 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11
1981-Jun-25 20:47 00:01 Jupiter 1.15870471305732 1.15870449172536 1.15870493438929 2.01227161175435 1.60848402955807 2444781.365977914 1.30675307759088 34.0555104395747 3.81506385828053 -84.932153388091 6060526.0101528 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11
2016-Jul-07 14:59 < 00:01 Jupiter 1.15204711082689 1.15204688755493 1.15204733409885 1.99959397684587 1.58994056923552 2457577.124453690 0.218264320809766 19.4184393996078 2.78059698688467 -74.7098834750319 13296549.031841 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11
2051-May-23 05:23 00:01 Jupiter 1.17810465195306 1.17810444383479 1.17810486007127 2.09492868514777 1.71778495776285 2470314.724492227 1.28050425132278 34.393695301637 2.11457308718451 -85.7606898208149 6540450.84633974 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11
2085-Oct-21 13:30 00:02 Jupiter 1.22247689103223 1.22247659473596 1.22247718732849 2.34750121533519 2.03101301363333 2482885.062810727 1.64260737993467 27.461494368933 4.70958321440771 -76.5292312278864 5212856.0653212 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11
2120-Feb-18 16:49 00:02 Jupiter 1.18767965230973 1.18767935183127 1.18767995278818 2.44554545458274 2.13409093712785 2495422.200985575 1.62658992740041 18.3813019254724 5.91052693648206 -64.1198896322498 6461833.50924465 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11
2154-Nov-28 11:19 00:02 Jupiter 1.14408371000052 1.14408344965025 1.14408397035072 2.42592386623565 2.09866775985944 2508123.971660404 1.52136825764472 14.5867774725864 7.47895826647822 -87.7469124945802 6566398.48838856 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11
2190-Jan-31 11:27 00:02 Jupiter 1.13638488001156 1.13638463992505 1.13638512009807 2.44685412599262 2.12046300666842 2520971.976849265 2.1110220384381 24.9141112557022 5.41995268337325 82.2884276275226 6584426.42180765 T 57 CATAB v2.0g-lin.ifort 2021-May-03 18:11:44 2021-May-03 18:11

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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