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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0471537197090418 3.4827e-08  
a 3.087629427646194 1.5005e-08 au
q 2.942036215049576 1.0808e-07 au
i 5.248949705289047 3.4546e-06 deg
node 120.0001547985737 4.1385e-05 deg
peri 249.9329244499112 5.5783e-05 deg
M 49.957489893811 3.6723e-05 deg
tp 2458725.498987711370
(2019-Aug-29.99898771)
0.00020251 TDB
period 1981.692127333472
5.43
1.4446e-05
3.955e-08
d
yr
n .1816629309036057 1.3243e-09 deg/d
Q 3.233222640242811 1.5713e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2972  
   data-arc span      29484 days (80.72 yr)  
   first obs. used      1940-02-10  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44276  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:08:16  

Additional Information
 Earth MOID = 1.94584 au 
 Jupiter MOID = 2.02737 au 
 T_jup = 3.218 
[ 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 11.4   n/a MPO416735  
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

[ show close-approach data ]
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 | Close-Approach Data ]
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