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21397 Leontovich (1998 FJ54)
Classification: Main-belt Asteroid          SPK-ID: 2021397
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1268249394248719 3.1023e-08  
a 2.304231464873967 6.8511e-09 au
q 2.011997448920442 7.3287e-08 au
i 6.855317268752779 3.6991e-06 deg
node 354.4637169836233 2.8276e-05 deg
peri 39.56230517256812 3.2368e-05 deg
M 17.69416908845729 1.5986e-05 deg
tp 2459333.706418626366
(2021-Apr-29.20641863)
5.6616e-05 TDB
period 1277.578459971594
3.50
5.6979e-06
1.56e-08
d
yr
n .2817830851719308 1.2567e-09 deg/d
Q 2.596465480827491 7.72e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1652  
   data-arc span      14678 days (40.19 yr)  
   first obs. used      1981-05-28  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:42:17  

Additional Information
 Earth MOID = 1.02188 au 
 Jupiter MOID = 2.83981 au 
 T_jup = 3.569 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457044.5 (2015-Jan-22.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1272558952383749 3.0985e-08  
q 2.011766356396309 7.3207e-08 au
tp 2456778.547874343123
(2014-May-01.04787434)
5.2816e-05 TDB
node 354.5561212197349 2.8302e-05 deg
peri 39.67924421034662 3.2357e-05 deg
i 6.852440847269238 3.6967e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1652  
   data-arc span      14678 days (40.19 yr)  
   first obs. used      1981-05-28  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:42:17  

Additional Information
 Jupiter MOID = 2.83981 au 
 T_jup = 3.569 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.600663462384257E-16 -2.261237712694665E-15 -2.131254904938311E-13 1.180246284766029E-14 -7.752693984071477E-14 -1.969522078349381E-15
q -2.261237712694665E-15 5.359295904002773E-15 5.556121264427574E-13 -2.791266455669806E-14 1.997570014467901E-13 4.727439159535121E-15
tp -2.131254904938311E-13 5.556121264427574E-13 2.789569489043225E-9 4.094670091095716E-12 8.372538087248009E-10 2.506619068101392E-12
node 1.180246284766029E-14 -2.791266455669806E-14 4.094670091095716E-12 8.010105296271656E-10 -7.938127305888772E-10 -1.122639414195603E-11
peri -7.752693984071477E-14 1.997570014467901E-13 8.372538087248009E-10 -7.938127305888772E-10 1.04695258979391E-9 1.189570158724006E-11
i -1.969522078349381E-15 4.727439159535121E-15 2.506619068101392E-12 -1.122639414195603E-11 1.189570158724006E-11 1.366563467796754E-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 14.99   n/a MPO636385  
diameter diameter 2.074 km 0.522 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.836 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.494   0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21397 Leontovich           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Alexander Leontovich (b. 1963), a 2003 Intel International Science and Engineering Fair Excellence in Teaching Award finalist, is a teacher at the Moscow State Educational Center of Creativity of the Young, Lyceum No. 1553, Moscow, Russia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25

Alternate Designations
 1998 FJ54 = 1981 KK1 = 1982 UB8 = 2000 WL72 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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