1997 CY21

1997CY21, 2001 BY37, 2001BY37, 39755, J97C21Y, K01B37Y

All data for this body: [vot]

MPC data
Name (number) 1997 CY21 (39755)
a 2.66095
e 0.10922
i / sin(i) 13.4512 / 0.23262
q 2.37033
Q 2.95157
ω 8.0519
Node 159.2211
m 172.2434
n 0.2271
Epoch 2460800.5
nobs 1333
nopp 21
Years observed 1997-2025
rms 0.81
Best values
[raw, vot]

Value Standard error
Parent Eunomia (15)
 
ap 2.662
ep 0.155
sin(ip) 0.222
G 0.150
H 15.220
Mass
D 2.61 0.632
pV 0.341 0.2277
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 10.315
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
15 Eunomia 0 Eunomia Novakovic 2019EPSC...13.1671N HCM
15 Eunomia 502 Eunomia 0.1000 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6616 0.1550 0.2224 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.61 0.632 0.632 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.341 0.2277 0.2277 Masiero 2011ApJ...741...68M 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
15.22 MPC-2023-12-04 MPC-2023-12-04 Phot
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S 0.854 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S 0.8651 0.8651 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT