1998 QX9

1998QX9, 12544, 1971 SD3, 1971SD3, 1987 OG1, 1987OG1, 1997 KJ3, 1997KJ3, J71S03D, J87O01G, J97K03J, J98Q09X

All data for this body: [vot]

MPC data

Name (number)	1998 QX9 (12544)
a	3.11732
e	0.20958
i / sin(i)	5.5031 / 0.09590
q	2.46399
Q	3.77066
ω	262.1510
Node	116.0472
m	166.5901
n	0.1791
Epoch	2460200.5

n_obs	1628
n_opp	24
Years observed	1971-2023
rms	0.63

Best values

	Value	Standard error
Parent

a_p	3.111
e_p	0.180
sin(i_p)	0.079

	Value	Standard error
G	0.150
H	14.120
Mass
D	11.95	1.929
pV	0.032	0.0121
Rotational Period

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
3.1107	0.1799	0.0794	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Oct-2022

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
11.48	3.230	3.230	Nugent	2016AJ....152...63N	NEATM
11.88	3.043	3.043	Masiero	2017AJ....154..168M	NEATM
12.11	4.690	4.690	Masiero	2021PSJ.....2..162M	NEATM
14.28	7.170	7.170	Masiero	2012ApJ...759L...8M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.026	0.0590	0.0590	Masiero	2012ApJ...759L...8M	NEATM
0.030	0.0200	0.0200	Nugent	2016AJ....152...63N	NEATM
0.032	0.0197	0.0197	Masiero	2017AJ....154..168M	NEATM
0.038	0.0180	0.0350	Masiero	2021PSJ.....2..162M	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
14.12			MPC-2023-12-04	MPC-2023-12-04	Phot