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JPL Small-Body Database Browser
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3261 Tvardovskij (1979 SF9)
Classification: Main-belt Asteroid          SPK-ID: 2003261
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07366073403388004 3.5206e-08  
a 2.904626657766513 1.417e-08 au
q 2.690669726061056 1.0333e-07 au
i 2.75100299180871 3.9651e-06 deg
node 142.949760168241 7.9647e-05 deg
peri 182.9968480628795 8.4037e-05 deg
M 40.01347333031543 2.6866e-05 deg
tp 2458399.527027542137
(2018-Oct-08.02702754)
0.00013505 TDB
period 1808.147707837595
4.95
1.3231e-05
3.622e-08
d
yr
n .199098778512145 1.4569e-09 deg/d
Q 3.11858358947197 1.5213e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2720  
   data-arc span      25529 days (69.89 yr)  
   first obs. used      1949-09-25  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43982  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:30:16  

Additional Information
 Earth MOID = 1.67783 au 
 Jupiter MOID = 2.12098 au 
 T_jup = 3.280 
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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 11.8   n/a MPO347547  
diameter diameter 11.732 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.36852 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.294   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3261 Tvardovskij (1979 SF9)          Discovered 1979-Sep-22 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1979 SF9 = 1949 SN1 = 1953 KB = 1959 RL = 1967 EQ = 1969 UW1 = 1975 XU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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