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60 Echo (A860 RB)
Classification: Main-belt Asteroid          SPK-ID: 2000060
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 131 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1849689725270603 1.9344e-08  
a 2.392565872721653 4.0146e-09 au
q 1.950015421541019 4.6917e-08 au
i 3.600328289584958 2.7706e-07 deg
node 191.5415665796361 9.735e-06 deg
peri 271.1887409443488 1.1776e-05 deg
M 8.274143869683023 8.0387e-06 deg
tp 2459169.431888883616
(2020-Nov-15.93188888)
3.0143e-05 TDB
period 1351.743476793902
3.70
3.4023e-06
9.315e-09
d
yr
n .2663227203832022 6.7032e-10 deg/d
Q 2.835116323902286 4.7572e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3540  
   data-arc span      58512 days (160.20 yr)  
   first obs. used      1861-01-05  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46355  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:47:36  

Additional Information
 Earth MOID = .97063 au 
 Jupiter MOID = 2.32403 au 
 T_jup = 3.505 
[ 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 8.5   n/a MPO502153 IRAS observations used: 6
magnitude slope G 0.27   n/a PDS3 (MPC 17257) Fit
diameter diameter 43.218 km 0.571 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 25.208 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Florence, W.B.; Zeigler, K.W. (1984) Minor Planet Bull. 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.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.373   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.854   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=2.44, mean=9.26, max.=12.36) deg.
U-B UB 0.452   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A860 RB)          Discovered 1860-Sep-14 by Ferguson, J. at Washington
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A860 RB = A899 EB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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