Echo

00060, 1860 RB, 1860RB, 1899 EB, 1899EB, I60R00B, I99E00B

All data for this body: [vot]

MPC data
Name (number) Echo (60)
a 2.39235
e 0.18450
i / sin(i) 3.6005 / 0.06280
q 1.95096
Q 2.83373
ω 270.8096
Node 191.5266
m 74.8706
n 0.2664
Epoch 2460800.5
nobs 7121
nopp 75
Years observed 1861-2025
rms 0.59
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.393
ep 0.202
sin(ip) 0.071
G 0.150
H 8.640
Mass 2.470e+17 2.400e+16
D 48.04 0.479
pV 0.251 0.0098
Value
Rotational Period 25.200
Period quality 3
Spectral Class S
Spectral Class Score 19.860
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3931 0.2021 0.0714 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.1500e+17 Folkner 2009IPNPR.178C...1F Ephem
3.4200e+17 Folkner 2014IPNPR.196C...1F Ephem
8.3978e+16 4.1562e+16 4.1562e+16 Fienga INPOP19a Ephem
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
43.22 0.570 0.570 Masiero 2014ApJ...791..121M NEATM
58.95 1.240 1.240 Usui 2011PASJ...63.1117U NEATM
59.36 2.991 2.991 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
59.75 5.980 5.980 Ali-Lagoa 2018A&A...612A..85A NEATM
60.00 3.519 3.519 Masiero 2011ApJ...741...68M NEATM
60.20 1.800 1.800 Tedesco 2002AJ....123.1056T STM
63.13 3.260 3.260 Ryan&Woodward 2010AJ....140..933R IRAS-STM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.191 0.0245 0.0245 Masiero 2011ApJ...741...68M NEATM
0.208 0.0420 0.0420 Ali-Lagoa 2018A&A...612A..85A NEATM
0.232 0.0239 0.0239 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.254 0.0160 0.0160 Tedesco 2002AJ....123.1056T STM
0.262 0.0264 0.0264 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.370 0.0300 0.0300 Masiero 2014ApJ...791..121M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
8.64 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
25.1574 2 Sidereal Michalowski 1993Icar..106..563M Model
25.206 3 Synodic Harris 1989Icar...77..171H Lightcurve
25.208 3 Synodic Florence 1984MPBu...11...33F Lightcurve
25.208 3 Synodic Zeigler 1985Icar...62..512Z Lightcurve
25.2285 2 Sidereal Durech 2016A&A...587A..48D Model
25.23 2 Sidereal Durech 2023A&A...675A..24D Model
30.0 1 Synodic Gehrels 1962ApJ...135..906G Lightcurve
52.0 0 Synodic Harris 1983Icar...54...59H Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S Bus VIS Bus 2002Icar..158..146B SPEC
S Tholen VIS Clark 1995Icar..113..387C PHOT
S 0.980000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
S 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT