1997 GJ18

1997GJ18, 1999 XC19, 1999XC19, 37769, J97G18J, J99X19C

All data for this body: [vot]

MPC data
Name (number) 1997 GJ18 (37769)
a 3.14370
e 0.06846
i / sin(i) 22.7345 / 0.38646
q 2.92849
Q 3.35890
ω 284.0807
Node 22.7754
m 265.1032
n 0.1768
Epoch 2460800.5
nobs 1597
nopp 22
Years observed 1997-2025
rms 0.79
Best values
[raw, vot]

Value Standard error
Parent Alauda (702)
 
ap 3.147
ep 0.038
sin(ip) 0.383
G 0.150
H 13.950
Mass
D 10.08 0.122
pV 0.058 0.0055
Value
Rotational Period 4.755
Period quality 2
Spectral Class S
Spectral Class Score 1.482
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
702 Alauda 0 Alauda Novakovic 2019EPSC...13.1671N HCM
702 Alauda 902 Alauda -0.3600 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1475 0.0384 0.3826 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.08 0.122 0.122 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.058 0.0055 0.0055 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
13.95 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
4.75552 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
B B 0.0837 0.0837 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S 0.247 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT