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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1987994533309203 3.228e-08  
a 2.203538086803385 5.68e-09 au
q 1.76547591975301 7.1453e-08 au
i 4.377050676553096 3.8282e-06 deg
node 178.4047826575538 3.907e-05 deg
peri 158.8076946257086 3.9922e-05 deg
M 313.2510071582162 8.373e-06 deg
tp 2459155.649016578750
(2020-Nov-02.14901658)
2.7883e-05 TDB
period 1194.756134263253
3.27
4.6195e-06
1.265e-08
d
yr
n .3013167203548145 1.165e-09 deg/d
Q 2.64160025385376 6.8091e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2598  
   data-arc span      18915 days (51.79 yr)  
   first obs. used      1968-10-23  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47084  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:57:52  

Additional Information
 Earth MOID = .757221 au 
 Jupiter MOID = 2.74665 au 
 T_jup = 3.633 
[ 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-August); 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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