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JPL Small-Body Database Browser
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109978 (2001 ST54)
Classification: Main-belt Asteroid          SPK-ID: 2109978
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1381358772994179 5.3338e-08  
a 3.175222228303036 1.966e-08 au
q 2.736610120175784 1.6998e-07 au
i 6.449965867449984 4.1118e-06 deg
node 100.3991539633127 5.1476e-05 deg
peri 244.9587628808679 5.3885e-05 deg
M 132.3710915735674 1.8211e-05 deg
tp 2458240.610811339084
(2018-May-02.11081134)
0.00010302 TDB
period 2066.615185128199
5.66
1.9194e-05
5.255e-08
d
yr
n .1741978877299636 1.6179e-09 deg/d
Q 3.613834336430289 2.2376e-08 au
  Orbit Determination Parameters
   # obs. used (total)      785  
   data-arc span      10631 days (29.11 yr)  
   first obs. used      1990-12-25  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57332  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:36:52  

Additional Information
 Earth MOID = 1.73707 au 
 Jupiter MOID = 1.80963 au 
 T_jup = 3.176 
[ 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 14.5   n/a MPO453561  
diameter diameter 6.680 km 0.316 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 144. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Szabo, R.; Pal, A.; Sarneczky, K.; Szabo, Gy.M.; et al. (2016) Astron. Astrophys. 596, A40.]
geometric albedo albedo 0.063   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109978 (2001 ST54)          Discovered 2001-Sep-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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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
1907-Apr-10 07:06 00:03 Jupiter 1.81277212131794 1.81277151295823 1.81277272967807 2.81856150243049 2.64759961306103 2417675.795586592 2.81225427132444 95.9705589240399 14.6261957614894 87.2565724852654 2262453.23850652 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
1917-Dec-26 12:16 00:03 Jupiter 1.96880129608704 1.96880033831311 1.96880225386108 3.70378178834638 3.58574324751012 2421589.010893733 2.55790799416983 68.1730101015344 29.3228734449381 -66.3443693488594 1993907.63232382 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
1993-May-01 01:39 < 00:01 Jupiter 1.98997238176163 1.98997174803412 1.98997301548902 2.56018046096177 2.38814431466801 2449108.568981808 0.720413018020805 65.2246926147481 14.0767315003419 -83.6616453051932 2118415.4769857 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
2004-Jan-22 22:13 < 00:01 Jupiter 1.84315058062809 1.84315002633653 1.84315113491953 2.18152298925169 1.9595763979081 2453027.425689860 0.416622942910214 62.0432476749068 6.35530054645871 -73.133171434066 2183501.05631511 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
2014-Oct-20 06:44 < 00:01 Jupiter 1.79331985321005 1.79331944944492 1.79332025697518 2.47664796754232 2.27796911270865 2456950.780255175 0.234949249653842 62.0483137459698 10.2929581327584 -79.7668432697559 2751105.87721154 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
2025-Jul-13 11:20 < 00:01 Jupiter 1.88151212662645 1.88151169891258 1.88151255434032 3.19522131331448 3.05107778352854 2460869.972471522 0.405847507491332 57.1452214578875 16.1956331973852 -89.0630055899031 3253066.53226054 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
2111-Aug-10 12:32 00:02 Jupiter 1.91720522728636 1.91720445032247 1.91720600425134 2.27390311246149 2.07051541038515 2492308.022518032 2.46820982641364 140.812347023302 7.79382259761823 -85.5177269161932 1957453.01164635 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
2122-May-04 21:50 00:03 Jupiter 1.8175544033897 1.81755386122123 1.8175549455595 2.20670170853538 1.98430996425211 2496228.409935205 2.78707609717716 159.982287767347 11.3174234083548 -79.1351411404148 2356167.74245968 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
2133-Jan-30 08:48 00:03 Jupiter 1.83001317389251 1.83001265113619 1.83001369664967 2.74150659298175 2.56713018676354 2500151.866863259 3.13068610925361 130.414978419153 12.8725257962395 -88.5568048940476 2652746.81208607 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
2143-Oct-23 14:04 00:03 Jupiter 1.96138608383635 1.96138504386948 1.96138712380299 3.64929281769052 3.52897154627053 2504070.086217945 3.47730985877042 55.0311447356401 39.0757907193812 74.7112837362328 1379008.33065639 T 26 CATAB v2.0f-lin.ifort 2020-Feb-24 03:36:55 2020-Feb-24 03:37
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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