Boulder

08489, 1976 GY8, 1976GY8, 1989 TA3, 1989TA3, 1993 LH2, 1993LH2, J76G08Y, J89T03A, J93L02H

All data for this body: [vot]

MPC data
Name (number) Boulder (8489)
a 3.14183
e 0.12068
i / sin(i) 5.8407 / 0.10176
q 2.76267
Q 3.52098
ω 102.0373
Node 145.8971
m 257.6229
n 0.1770
Epoch 2460800.5
nobs 3214
nopp 27
Years observed 1976-2025
rms 0.73
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.138
ep 0.147
sin(ip) 0.092
G 0.150
H 13.440
Mass
D 11.21 0.117
pV 0.081 0.0179
Value
Rotational Period
Period quality None
Spectral Class B
Spectral Class Score 5.559
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
10 Hygiea 0 Hygiea Novakovic 2019EPSC...13.1671N HCM
10 Hygiea 601 Hygiea Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1381 0.1466 0.0917 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
11.21 0.117 0.117 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.081 0.0179 0.0179 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
13.44 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
B B 0.4099 0.4530 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
B B 0.5166 0.4530 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
C DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
C 0.38 Bus VIS Carvano 2010A&A...510A..43C PHOT
C Kl None None Movis NIR Popescu 2018A&A...617A..12P PHOT