Ishihara

09971, 1991 YC2, 1991YC2, 1993 HS, 1993HS, 1996 EU1, 1996EU1, J91Y02C, J93H00S, J96E01U

All data for this body: [vot]

MPC data
Name (number) Ishihara (9971)
a 2.18100
e 0.12232
i / sin(i) 2.7443 / 0.04788
q 1.91421
Q 2.44779
ω 246.3826
Node 20.4647
m 294.8998
n 0.3060
Epoch 2460800.5
nobs 4016
nopp 24
Years observed 1991-2025
rms 0.67
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.181
ep 0.117
sin(ip) 0.050
G 0.150
H 13.970
Mass
D 5.01 0.069
pV 0.233 0.0281
Value
Rotational Period 6.710
Period quality 2
Spectral Class S
Spectral Class Score 4.626
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.1813 0.1172 0.0502 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.01 0.069 0.069 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.233 0.0281 0.0281 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
13.97 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
6.715 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
6.71574 2 Sidereal Durech 2016A&A...587A..48D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S 0.771 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT