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2204 Lyyli (1943 EQ)
Classification: Mars-crossing Asteroid          SPK-ID: 2002204
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4077687029706254 4.4522e-08  
a 2.5880407364975 1.3304e-08 AU
q 1.532718722140772 1.1392e-07 AU
i 20.56300458060791 7.5398e-06 deg
node 160.4640240104264 1.5443e-05 deg
peri 283.2618938292425 1.9594e-05 deg
M 66.27934159085473 1.5863e-05 deg
tp 2456520.517573159121
(2013-Aug-16.01757316)
6.514e-05 JED
period 1520.740418408503
4.16
1.1726e-05
3.21e-08
d
yr
n .2367267915301088 1.8253e-09 deg/d
Q 3.643362750854227 1.8728e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1142  
   data-arc span      26051 days (71.32 yr)  
   first obs. used      1943-03-03  
   last obs. used      2014-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49883  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:02:05  

Additional Information
 Earth MOID = .68362 AU 
 T_jup = 3.216 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.0 mag n/a MPO247388  
diameter diameter 25.16 km 2.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 11.063 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Warner, B.D. (2010) Minor Planet Bul. 37, 161-165.]
geometric albedo albedo 0.0232   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
SMASSII spectral type spec_B X   n/a Xu et al. (1995) Icarus 115, 1-35  

2204 Lyyli (1943 EQ)          Discovered 1943-Mar-03 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1943 EQ = 1968 DN 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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