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2167 Erin (1971 LA)
Classification: Main-belt Asteroid          SPK-ID: 2002167
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1842193857648653 6.0913e-08  
a 2.542565346740057 1.0132e-08 au
q 2.074175520296572 1.5791e-07 au
i 6.02731570683608 3.9761e-06 deg
node 252.9108717739748 4.8058e-05 deg
peri 274.1133113425234 4.9229e-05 deg
M 351.9506551525179 1.1231e-05 deg
tp 2458633.610416602849
(2019-May-30.11041660)
4.625e-05 TDB
period 1480.834801201768
4.05
8.8519e-06
2.424e-08
d
yr
n .243106118054386 1.4532e-09 deg/d
Q 3.010955173183542 1.1999e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3057  
   data-arc span      23835 days (65.26 yr)  
   first obs. used      1954-02-07  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39264  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:31:13  

Additional Information
 Earth MOID = 1.09187 au 
 Jupiter MOID = 2.02073 au 
 T_jup = 3.413 
[ 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 12.1   n/a MPO435717  
diameter diameter 8.998 km 0.365 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.7186 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Montigiani, N.; Benedetti, W.; Stecher, G.; Ford, L.; et al. (2008) Minor Planet Bull. 35, 107-108.]
[Stecher, G.; Ford, L.; Lorenzen, K.; Ulrich, S. (2008) Minor Planet Bull. 35, 76-77.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.379   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B S   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)

2167 Erin           Discovered 1971 June 1 at the Perth Observatory.
Named in honor of the daughter of George Punko, member of the astrometric team at the Perth Observatory.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 6530Last Updated: 2006-03-21

Alternate Designations
 1971 LA = 1938 EV = 1954 CH = 1973 WG = 1973 YF1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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