1991 UY

1991UY, 05600, 1981 YC1, 1981YC1, 1984 UR1, 1984UR1, J81Y01C, J84U01R, J91U00Y

All data for this body: [vot]

MPC data

Name (number)	1991 UY (5600)
a	2.27800
e	0.13020
i / sin(i)	7.0291 / 0.12237
q	1.98141
Q	2.57459
ω	316.0397
Node	74.2417
m	275.7927
n	0.2867
Epoch	2460800.5

n_obs	5563
n_opp	26
Years observed	1981-2025
rms	0.59

Best values

	Value	Standard error
Parent	Vesta (4)

a_p	2.278
e_p	0.109
sin(i_p)	0.107
G	0.150
H	13.450
Mass
D	5.88	0.459
pV	0.255	0.0697

	Value
Rotational Period
Period quality	None
Spectral Class	S
Spectral Class Score	25.485

Family data

Parent	Parent name	Family ID	Family name	C_j	Author	Reference	Method
4	Vesta	401	Vesta		Nesvorny	doi.org/10.26033/6cg5-pt13	HCM-2020-08-14

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.2777	0.1088	0.1070	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
5.88	0.501	0.501	Masiero	2011ApJ...741...68M	NEATM
5.89	1.140	1.140	Nugent	2016AJ....152...63N	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.210	0.0900	0.0900	Nugent	2016AJ....152...63N	NEATM
0.322	0.1100	0.1100	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
13.45			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
L	S	0.720000	0.280000	Mahlke	VIS	Mahlke	2022A&A...665A..26M	SPEC
S				Tholen	VIS	Lazzaro	2004Icar..172..179L	SPEC
S		0.557		Bus-Demeo	VIS	Sergeyev	2022A&A...658A.109S	PHOT
S	S	0.9191	0.9580	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
S	S	0.9477	0.9580	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
S	S	0.9903	0.9580	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
SI				Bus	VIS	Lazzaro	2004Icar..172..179L	SPEC