Grotius

09994, 1981 WH9, 1981WH9, 4028 P-L, 4028P-L, J81W09H, PLS4028

All data for this body: [vot]

MPC data
Name (number) Grotius (9994)
a 2.58633
e 0.17478
i / sin(i) 7.1838 / 0.12505
q 2.13429
Q 3.03837
ω 223.7850
Node 207.1075
m 148.4509
n 0.2370
Epoch 2460800.5
nobs 2772
nopp 25
Years observed 1960-2025
rms 0.73
Best values
[raw, vot]

Value Standard error
Parent Rafita (1644)
 
ap 2.585
ep 0.174
sin(ip) 0.133
G 0.150
H 14.500
Mass
D 3.75 0.146
pV 0.263 0.0403
Value
Rotational Period 9.210
Period quality 2
Spectral Class S
Spectral Class Score 5.964
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
1644 Rafita 518 Rafita 0.7300 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5850 0.1743 0.1333 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.75 0.146 0.146 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.263 0.0403 0.0403 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
14.50 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
9.219 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
S 0.994 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT