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20942 (2092 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2020942
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09891888748119639 4.5184e-08  
a 2.646850003847072 1.2534e-08 au
q 2.38502654613692 1.1623e-07 au
i 5.295566668579945 4.6222e-06 deg
node 181.1230918234745 3.6856e-05 deg
peri 338.1378496038655 4.1127e-05 deg
M 199.0781778075632 2.0422e-05 deg
tp 2459903.580193772734
(2022-Nov-20.08019377)
9.2012e-05 TDB
period 1572.868529014706
4.31
1.1172e-05
3.059e-08
d
yr
n .228881176881017 1.6257e-09 deg/d
Q 2.908673461557225 1.3773e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1170  
   data-arc span      21978 days (60.17 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-11-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52916  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:07  

Additional Information
 Earth MOID = 1.39416 au 
 Jupiter MOID = 2.07121 au 
 T_jup = 3.379 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457512.5 (2016-May-04.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09697718995562614 4.5022e-08  
q 2.391669471883405 1.1558e-07 au
tp 2456752.730271654559
(2014-Apr-05.23027165)
8.337e-05 TDB
node 181.2786689731673 3.6874e-05 deg
peri 337.4351890961626 4.1373e-05 deg
i 5.292417823246978 4.6191e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1170  
   data-arc span      21978 days (60.17 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-11-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52916  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:07  

Additional Information
 Jupiter MOID = 2.07121 au 
 T_jup = 3.379 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.026939152108902E-15 -5.181267826422485E-15 8.753789954926751E-13 5.520489465833653E-15 1.839236572576542E-13 -1.053043814187063E-15
q -5.181267826422485E-15 1.335770353237988E-14 -1.945216927461877E-12 -1.3412730370757E-14 -3.951262967053727E-13 2.740315068905546E-15
tp 8.753789954926751E-13 -1.945216927461877E-12 6.950528031965132E-9 1.430994549962243E-11 1.572928428160653E-9 -2.614547946580656E-12
node 5.520489465833653E-15 -1.3412730370757E-14 1.430994549962243E-11 1.359671636638572E-9 -1.350257289141379E-9 -3.12003374980909E-11
peri 1.839236572576542E-13 -3.951262967053727E-13 1.572928428160653E-9 -1.350257289141379E-9 1.711687899884597E-9 3.047936738362849E-11
i -1.053043814187063E-15 2.740315068905546E-15 -2.614547946580656E-12 -3.12003374980909E-11 3.047936738362849E-11 2.133578270645784E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.71   n/a E2021B10  
diameter diameter 2.464 km 0.393 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.345 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.319   0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20942 (2092 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2092 T-2 = 6385 P-L 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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