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2553 Viljev (1979 FS2)
Classification: Main-belt Asteroid          SPK-ID: 2002553
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 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04741250850372684 2.3225e-08  
a 3.088606604535304 1.3454e-08 au
q 2.942168017633107 7.0363e-08 au
i 5.248930797479696 4.0565e-07 deg
node 119.9995028620342 2.6331e-06 deg
peri 250.2811277341017 1.2747e-05 deg
M 121.5019387133758 1.2615e-05 deg
tp 2458727.350700776911
(2019-Aug-31.85070078)
6.7715e-05 TDB
period 1982.632954430323
5.43
1.2955e-05
3.547e-08
d
yr
n .1815767256342413 1.1864e-09 deg/d
Q 3.235045191437501 1.4092e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3357  
   data-arc span      29700 days (81.31 yr)  
   first obs. used      1940-02-10  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 21:46:16  

Additional Information
 Earth MOID = 1.9453 au 
 Jupiter MOID = 2.02527 au 
 T_jup = 3.217 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457039.5 (2015-Jan-17.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04689583009567426 2.3694e-08  
q 2.941412437854319 7.1903e-08 au
tp 2456711.612821533768
(2014-Feb-23.11282153)
6.3607e-05 TDB
node 120.2222419074332 2.6303e-06 deg
peri 244.0840304480351 1.2271e-05 deg
i 5.254519343680906 4.0629e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3357  
   data-arc span      29700 days (81.31 yr)  
   first obs. used      1940-02-10  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 21:46:16  

Additional Information
 Jupiter MOID = 2.02527 au 
 T_jup = 3.217 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.614167394624882E-16 -1.677243911537035E-15 4.79283683733639E-14 6.142193649925043E-15 -4.751232903500064E-14 -1.750829994249813E-16
q -1.677243911537035E-15 5.170041733315933E-15 4.706599217577374E-14 -1.88934504561369E-14 1.83661765084291E-13 4.835477982830534E-16
tp 4.79283683733639E-14 4.706599217577374E-14 4.045856907557556E-9 5.562549641631266E-12 7.467003820527853E-10 4.788055924127329E-14
node 6.142193649925043E-15 -1.88934504561369E-14 5.562549641631266E-12 6.918346984618921E-12 -6.280377700672003E-12 -3.186022972949131E-14
peri -4.751232903500064E-14 1.83661765084291E-13 7.467003820527853E-10 -6.280377700672003E-12 1.505874239432982E-10 1.240003292505517E-13
i -1.750829994249813E-16 4.835477982830534E-16 4.788055924127329E-14 -3.186022972949131E-14 1.240003292505517E-13 1.650687203669429E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.49   n/a E2021B10  
diameter diameter 14.021 km 0.212 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.271   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2553 Viljev (1979 FS2)          Discovered 1979-Mar-29 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1979 FS2 = 1940 CK = 1954 UA1 = 1956 AU = 1968 HT = 1978 EV1 = A899 PG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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