1998 BW8

1998BW8, 1999 HZ2, 1999HZ2, 31211, J98B08W, J99H02Z

All data for this body: [vot]

MPC data
Name (number) 1998 BW8 (31211)
a 3.19324
e 0.08267
i / sin(i) 5.0647 / 0.08828
q 2.92925
Q 3.45722
ω 206.0818
Node 15.1110
m 215.8873
n 0.1727
Epoch 2460800.5
nobs 2334
nopp 22
Years observed 1998-2025
rms 0.79
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.185
ep 0.115
sin(ip) 0.088
G 0.150
H 13.850
Mass
D 9.69 0.163
pV 0.076 0.0026
Value
Rotational Period 3.690
Period quality 2
Spectral Class Bk
Spectral Class Score 1.000
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
3.1848 0.1147 0.0885 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.19 0.277 0.277 Masiero 2011ApJ...741...68M NEATM
9.42 0.202 0.202 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.074 0.0028 0.0028 Masiero 2011ApJ...741...68M NEATM
0.087 0.0078 0.0078 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
13.85 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
3.697 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
Bk Bk None None Movis NIR Popescu 2018A&A...617A..12P PHOT
V 0.163 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT