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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1837403594596448 4.6303e-08  
a 2.392459939101464 4.1935e-09 AU
q 1.952868489898161 1.1095e-07 AU
i 3.601236559875058 5.3556e-06 deg
node 191.6148854188525 8.6958e-05 deg
peri 270.8767414085603 8.7937e-05 deg
M 89.53573960250579 1.3744e-05 deg
tp 2456464.329683430972
(2013-Jun-20.82968343)
5.1472e-05 JED
period 1351.653702779745
3.70
3.5537e-06
9.73e-09
d
yr
n .26634040898171 7.0026e-10 deg/d
Q 2.832051388304766 4.964e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1502  
   data-arc span      55975 days (153.25 yr)  
   first obs. used      1861-01-05  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .64695  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:34:04  

Additional Information
 Earth MOID = .973211 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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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