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2902 Westerlund (1980 FN3)
Classification: Main-belt Asteroid          SPK-ID: 2002902
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1987592999723501 3.7173e-08  
a 2.202781476993155 6.2638e-09 au
q 1.764958172633936 8.1197e-08 au
i 4.377484527784332 4.1919e-06 deg
node 178.4192390688928 3.9466e-05 deg
peri 158.9121206101262 4.0404e-05 deg
M 192.5498650067406 9.3686e-06 deg
tp 2459155.941790098552
(2020-Nov-02.44179010)
3.1736e-05 TDB
period 1194.140837470975
3.27
5.0935e-06
1.395e-08
d
yr
n .3014719777630503 1.2859e-09 deg/d
Q 2.640604781352374 7.5088e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2417  
   data-arc span      18459 days (50.54 yr)  
   first obs. used      1968-10-23  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47361  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 22:30:35  

Additional Information
 Earth MOID = .755807 au 
 Jupiter MOID = 2.74487 au 
 T_jup = 3.634 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0   n/a MPO337273  
diameter diameter 4.120 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 30. h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Owings, L.E. (2018) Minor Planet Bull. 45, 227-231.]
geometric albedo albedo 0.247   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2902 Westerlund (1980 FN3)          Discovered 1980-Mar-16 by Lagerkvist, C.-I. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1980 FN3 = 1968 UF2 = 1981 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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