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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456624.5 (2013-Nov-28.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1324676144673683 5.4264e-08  
q 2.758111879025266 1.7136e-07 au
tp 2456156.137270828396
(2012-Aug-16.63727083)
0.00011288 TDB
node 100.6749621874085 5.5955e-05 deg
peri 242.5275919962695 5.8883e-05 deg
i 6.471856267773503 4.1323e-06 deg
  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
 Jupiter MOID = 1.80709 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.944614851826116E-15 -9.249480611307373E-15 2.750145663907054E-12 -1.202320101316465E-14 4.271626818756442E-13 -2.284926236356363E-16
q -9.249480611307373E-15 2.936334466905885E-14 -8.608095899949241E-12 3.614209041662794E-14 -1.321745940585071E-12 1.229331985445755E-15
tp 2.750145663907054E-12 -8.608095899949241E-12 1.27416018898162E-8 -4.568361900101466E-12 2.151039659545187E-9 -3.159778573563884E-12
node -1.202320101316465E-14 3.614209041662794E-14 -4.568361900101466E-12 3.130987470628247E-9 -3.111545250071649E-9 -4.039919098806178E-12
peri 4.271626818756442E-13 -1.321745940585071E-12 2.151039659545187E-9 -3.111545250071649E-9 3.467233718706826E-9 3.55451780757327E-12
i -2.284926236356363E-16 1.229331985445755E-15 -3.159778573563884E-12 -4.039919098806178E-12 3.55451780757327E-12 1.707590220480438E-11

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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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