1999 GJ4

1999GJ4, 40267, J99G04J

All data for this body: [vot]

MPC data
Name (number) 1999 GJ4 (40267)
a 1.33875
e 0.80840
i / sin(i) 34.4791 / 0.56611
q 0.25651
Q 2.42098
ω 211.9555
Node 148.2073
m 163.7317
n 0.6363
Epoch 2460800.5
nobs 3587
nopp 30
Years observed 1955-2025
rms 0.75
Best values
[raw, vot]

Value Standard error
Parent
 
ap
ep
sin(ip)
G 0.150
H 15.540
Mass
D 1.67 0.052
pV 0.361 0.0686
Value
Rotational Period 4.956
Period quality 3
Spectral Class Sq
Spectral Class Score 12.000
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.64 0.053 0.053 Mainzer 2011ApJ...743..156M NEATM
1.94 0.450 0.450 Masiero 2020PSJ.....1....5M NEATM
2.44 0.326 0.326 Mainzer 2014ApJ...792...30M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.100 0.1790 0.1790 Mainzer 2014ApJ...792...30M NEATM
0.279 0.1430 0.1430 Masiero 2020PSJ.....1....5M NEATM
0.453 0.0870 0.0870 Mainzer 2011ApJ...743..156M 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
15.54 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
4.953 3 Synodic Warner 2014MPBu...41..157W Lightcurve
4.9567 3 Synodic Galad 2005EM&P...97..147G Lightcurve
4.9569 3 Synodic Skiff LCDB Lightcurve
4.95692 3 Synodic Galad 2005EM&P...97..147G Lightcurve
4.957 3 Synodic Vaduvescu 2017EM&P..120...41V Lightcurve
4.95707 2 Sidereal Durech 2018A&A...617A..57D Model
4.958 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
4.9582 3 Synodic Warner 2017MPBu...44..223W Lightcurve
4.959 3- Synodic Warner 2014MPBu...41..157W Lightcurve
4.97 3- Synodic Polishook 2012MPBu...39..187P Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
R S 0.880000 0.100000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
S Bus VIS Lin 2018P&SS..152..116L PHOT
Sq Bus VIS Binzel 2019Icar..324...41B SPEC
Sq Tholen VISNIR Binzel 2001Icar..151..139B SPEC