1999 GC56

1999GC56, 2002 XJ33, 2002XJ33, G2171, J99G56C, K02X33J

All data for this body: [vot]

MPC data

Name (number)	1999 GC56 (162171)
a	3.12946
e	0.13427
i / sin(i)	16.6908 / 0.28721
q	2.70927
Q	3.54965
ω	47.0911
Node	2.3026
m	267.3383
n	0.1780
Epoch	2460200.5

n_obs	900
n_opp	17
Years observed	1996-2023
rms	0.76

Best values

	Value	Standard error
Parent

a_p	3.134
e_p	0.101
sin(i_p)	0.288

	Value	Standard error
G	0.150
H	14.790
Mass
D	7.62	0.482
pV	0.044	0.0153
Rotational Period	4.547

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
3.1336	0.1007	0.2880	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Oct-2022

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
7.62	0.482	0.482	Masiero	2011ApJ...741...68M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.044	0.0153	0.0153	Masiero	2011ApJ...741...68M	NEATM

G data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.15			MPC-2023-12-94	MPC-2023-12-94	Phot

H data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
14.79			MPC-2023-12-04	MPC-2023-12-04	Phot

Period data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
4.55			Pal	2020ApJS..247...26P	Lightcurve
4.55			Durech	2023A&A...675A..24D	Model