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60 Echo
Classification: Main-belt Asteroid          SPK-ID: 2000060
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 105 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1834052222928199 2.9212e-08  
a 2.393191431875489 4.9103e-09 au
q 1.954267625323093 7.0203e-08 au
i 3.601165529090919 3.7328e-06 deg
node 191.5961286071388 5.7739e-05 deg
peri 270.9632628132523 5.8192e-05 deg
M 249.2119859194038 9.5521e-06 deg
tp 2457816.654756284402
(2017-Mar-04.15475628)
3.6408e-05 JED
period 1352.27365077053
3.70
4.1619e-06
1.139e-08
d
yr
n .2662183055884219 8.1933e-10 deg/d
Q 2.832115238427886 5.8109e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2027  
   data-arc span      56587 days (154.93 yr)  
   first obs. used      1861-01-05  
   last obs. used      2015-12-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54169  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:30:49  

Additional Information
 Earth MOID = .974793 au 
 Jupiter MOID = 2.3351 au 
 T_jup = 3.505 
[ 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 8.21 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
magnitude slope G 0.27   n/a PDS3 (MPC 17257) Fit
diameter diameter 60.20 km 1.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 25.208 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Florence, W.B.; Zeigler, K.W. (1984) Minor Planet Bul. 11, 33-34.]
[Zeigler, K.W.; Florence, W.B. (1985) Icarus 62, 512-517.]
[Harris, A.W.; Young, J.W.; Bowell, E.; Martin, L.J.; et al. (1989) Icarus 77, 171-186.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
geometric albedo albedo 0.2535   0.016 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
B-V BV .854 mag .019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=2.44, mean=9.26, max.=12.36) deg.
U-B UB .452 mag .027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=2.44, mean=9.26, max.=12.36) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
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)

60 Echo          Discovered 1860-Sep-14 by Ferguson, J. at Washington
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A899 EB 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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