Ridley

04025, 1974 RO1, 1974RO1, 1981 WU, 1981WU, J74R01O, J81W00U

All data for this body: [vot]

MPC data
Name (number) Ridley (4025)
a 2.25181
e 0.16688
i / sin(i) 3.1295 / 0.05459
q 1.87602
Q 2.62760
ω 245.7980
Node 147.3002
m 324.2488
n 0.2917
Epoch 2460800.5
nobs 3773
nopp 30
Years observed 1974-2025
rms 0.68
Best values
[raw, vot]

Value Standard error
Parent Nysa (44)
 
ap 2.252
ep 0.145
sin(ip) 0.053
G 0.150
H 13.850
Mass
D 4.39 0.162
pV 0.253 0.0359
Value
Rotational Period 28.200
Period quality 3
Spectral Class S
Spectral Class Score 22.046
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
44 Nysa 405 Nysa-Polana -3.2800 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2519 0.1451 0.0531 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.02 1.060 1.060 Nugent 2016AJ....152...63N NEATM
4.38 0.230 0.230 Masiero 2011ApJ...741...68M NEATM
4.42 0.235 0.235 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.249 0.0509 0.0509 Masiero 2011ApJ...741...68M NEATM
0.253 0.0539 0.0539 Masiero 2011ApJ...741...68M NEATM
0.280 0.1500 0.1500 Nugent 2016AJ....152...63N 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
13.85 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
28.24 3 Synodic Skiff LCDB Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
A S 0.6531 0.7380 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S 0.83 Bus VIS Carvano 2010A&A...510A..43C PHOT
S 0.943 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S 0.990000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
S S DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT
S S 0.9630 0.7380 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT