1989 GR1

1989GR1, 19974, 1999 UW13, 1999UW13, J89G01R, J99U13W

All data for this body: [vot]

MPC data

Name (number)	1989 GR1 (19974)
a	2.60356
e	0.06539
i / sin(i)	13.5738 / 0.23470
q	2.43332
Q	2.77380
ω	227.8339
Node	216.7934
m	322.8282
n	0.2346
Epoch	2460800.5

n_obs	1840
n_opp	22
Years observed	1989-2025
rms	0.77

Best values

	Value	Standard error
Parent	Maria (170)

a_p	2.604
e_p	0.080
sin(i_p)	0.246
G	0.150
H	14.890
Mass
D	3.52	0.294
pV	0.235	0.0315

	Value
Rotational Period
Period quality	None
Spectral Class	S
Spectral Class Score	23.656

Family data

Parent	Parent name	Family ID	Family name	C_j	Author	Reference	Method
170	Maria	0	Maria		Novakovic	2019EPSC...13.1671N	HCM
170	Maria	506	Maria	0.3200	Nesvorny	doi.org/10.26033/6cg5-pt13	HCM-2020-08-14

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.6041	0.0799	0.2456	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
3.10	0.516	0.516	Masiero	2011ApJ...741...68M	NEATM
3.72	0.357	0.357	Masiero	2011ApJ...741...68M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.202	0.0397	0.0397	Masiero	2011ApJ...741...68M	NEATM
0.292	0.0518	0.0518	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
14.89			MPC-2023-12-04	MPC-2023-12-04	Phot

Spectral Class Data

Class 1	Class 2	Probability of Class 1	Probability of Class 2	Taxonomy	Wavelength	Author	Reference	Method
S		0.836		Bus-Demeo	VIS	Sergeyev	2022A&A...658A.109S	PHOT
S	S	0.5242	0.8150	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
S	S	0.7748	0.8150	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
S	S	0.8384	0.8150	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
S	S	0.9693	0.8150	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
V	V	None	None	Movis	NIR	Popescu	2018A&A...617A..12P	PHOT