1991 UA2

1991UA2, 07340, 1993 BZ3, 1993BZ3, J91U02A, J93B03Z

All data for this body: [vot]

MPC data

Name (number)	1991 UA2 (7340)
a	2.83134
e	0.03056
i / sin(i)	1.0839 / 0.01892
q	2.74483
Q	2.91786
ω	210.1297
Node	302.9005
m	259.3067
n	0.2069
Epoch	2460800.5

n_obs	2906
n_opp	28
Years observed	1989-2025
rms	0.73

Best values

	Value	Standard error
Parent	Koronis (158)

a_p	2.832
e_p	0.064
sin(i_p)	0.038
G	0.150
H	13.920
Mass
D	5.57	0.332
pV	0.227	0.0317

	Value
Rotational Period	10.690
Period quality	2
Spectral Class	S
Spectral Class Score	18.460

Family data

Parent	Parent name	Family ID	Family name	C_j	Author	Reference	Method
158	Koronis	0	Koronis		Novakovic	2019EPSC...13.1671N	HCM
158	Koronis	605	Koronis	-0.3900	Nesvorny	doi.org/10.26033/6cg5-pt13	HCM-2020-08-14

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.8323	0.0641	0.0381	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
5.57	0.332	0.332	Masiero	2011ApJ...741...68M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.227	0.0317	0.0317	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
13.92			MPC-2023-12-04	MPC-2023-12-04	Phot

Periods

Value	Quality	Side real or Synodic	Author	Reference	Method
10.697	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
10.6983	2	Sidereal	Durech	2023A&A...675A..24D	Model

Spectral Class Data

Class 1	Class 2	Probability of Class 1	Probability of Class 2	Taxonomy	Wavelength	Author	Reference	Method
S				DeMeo-Carry	VIS	DeMeo	2013Icar..226..723D	PHOT
S		0.60		Bus	VIS	Carvano	2010A&A...510A..43C	PHOT
S		0.905		Bus-Demeo	VIS	Sergeyev	2022A&A...658A.109S	PHOT
S	S	0.6403	0.9130	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
S	S	0.9981	0.9130	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT