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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1378522337871426 5.6344e-08  
a 3.175176640638811 2.015e-08 au
q 2.737471448057995 1.8083e-07 au
i 6.449756814026178 4.115e-06 deg
node 100.399697126313 5.6454e-05 deg
peri 244.9362097415281 5.8796e-05 deg
M 62.74743763855545 1.8476e-05 deg
tp 2458240.299958920133
(2018-May-01.79995892)
0.00010559 TDB
period 2066.570678721619
5.66
1.9672e-05
5.386e-08
d
yr
n .1742016393180882 1.6582e-09 deg/d
Q 3.612881833219626 2.2927e-08 au
  Orbit Determination Parameters
   # obs. used (total)      732  
   data-arc span      10574 days (28.95 yr)  
   first obs. used      1990-12-25  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58263  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 09:08:47  

Additional Information
 Earth MOID = 1.73702 au 
 Jupiter MOID = 1.80709 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-January); 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

[ 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
1907-Apr-10 07:06 00:03 Jupiter 1.8127719064517 1.81277129691148 1.81277251599233 2.81856010844309 2.64759810814224 2417675.795625156 2.86170800351892 99.881288691697 14.70621240303 87.4979221083185 2190100.29407569 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
1917-Dec-26 12:16 00:03 Jupiter 1.96880109329636 1.9688001347764 1.96880205181643 3.70378019550326 3.58574158987408 2421589.010927672 2.60007768132682 68.6807973886764 30.0601846585375 -67.1789297367058 1990559.67885894 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
1993-May-01 01:39 < 00:01 Jupiter 1.98997246386202 1.98997180785738 1.98997311986655 2.56018095201678 2.38814484845079 2449108.569046146 0.723411036289357 68.2027754634708 14.7264934026181 -84.5642863604617 2023574.82251247 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
2004-Jan-22 22:13 < 00:01 Jupiter 1.84315050139359 1.84314992280316 1.84315107998392 2.18152292897076 1.95957632071809 2453027.425774684 0.41753690164923 66.5228872581354 6.50323732391017 -72.7547336976837 2089985.29909884 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
2014-Oct-20 06:44 < 00:01 Jupiter 1.79331965052425 1.79331924234574 1.79332005870286 2.47664694187002 2.27796797414522 2456950.780366386 0.254666982244064 68.1161278281516 10.3287340084203 -79.8885734455003 2741877.94195346 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
2025-Jul-13 11:21 < 00:01 Jupiter 1.88151188810964 1.88151143436242 1.88151234185675 3.19521965381851 3.05107602692763 2460869.972576353 0.443556340121426 61.1166488473968 17.2428455641709 -89.7007194112827 3116701.62737091 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
2111-Aug-10 12:33 00:03 Jupiter 1.91720525651894 1.91720441089024 1.91720610214884 2.27390349096257 2.07051582932003 2492308.022662333 2.55153052748329 145.478927996338 7.8581658762665 -85.4382446183891 1819197.26786201 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
2122-May-04 21:51 00:03 Jupiter 1.81755425957684 1.81755368699282 1.81755483216263 2.2067012457998 1.98430943107269 2496228.410096888 2.87786488399132 167.104712381829 12.0560364769646 -78.9955200893909 2291589.73442786 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
2133-Jan-30 08:49 00:03 Jupiter 1.83001292803592 1.83001238831686 1.83001346775581 2.74150518490036 2.56712865881332 2500151.867035381 3.23053484588867 136.724067523691 13.2263634393465 -88.5923766469673 2583342.41296194 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
2143-Oct-23 14:04 00:04 Jupiter 1.9613858362715 1.96138472398723 1.96138694855554 3.64929098577633 3.5289696364509 2504070.086378786 3.58673079129332 58.080416483772 41.9777208923627 74.5234611779736 1294862.04880997 T 24 CATAB v2.0f-lin.ifort 2019-Dec-14 09:08:58 2019-Dec-14 09:09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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