Umtata

01397, 1931 GK, 1931GK, 1936 PG, 1936PG, 1945 QF, 1945QF, 1945 RC, 1945RC, 1948 EB1, 1948EB1, J31G00K, J36P00G, J45Q00F, J45R00C, J48E01B

All data for this body: [vot]

MPC data

Name (number)	Umtata (1397)
a	2.68150
e	0.25407
i / sin(i)	3.5093 / 0.06121
q	2.00022
Q	3.36278
ω	206.4041
Node	77.4200
m	82.1483
n	0.2245
Epoch	2460800.5

n_obs	5353
n_opp	43
Years observed	1936-2025
rms	0.62

Best values

	Value	Standard error
Parent

a_p	2.684
e_p	0.250
sin(i_p)	0.041
G	0.150
H	11.420
Mass
D	21.36	0.167
pV	0.098	0.0112

	Value
Rotational Period	30.000
Period quality	1
Spectral Class	X
Spectral Class Score	3.986

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.6837	0.2501	0.0410	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
18.41	1.840	1.840	Ali-Lagoa	2018A&A...612A..85A	NEATM
20.35	0.300	0.300	Usui	2011PASJ...63.1117U	NEATM
20.80	0.290	0.290	Masiero	2014ApJ...791..121M	NEATM
21.28	2.130	2.130	Ali-Lagoa	2018A&A...612A..85A	NEATM
22.89	0.285	0.285	Masiero	2011ApJ...741...68M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.079	0.0140	0.0140	Masiero	2011ApJ...741...68M	NEATM
0.080	0.0500	0.0500	Masiero	2014ApJ...791..121M	NEATM
0.126	0.0250	0.0250	Ali-Lagoa	2018A&A...612A..85A	NEATM
0.168	0.0340	0.0340	Ali-Lagoa	2018A&A...612A..85A	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
11.42			MPC-2023-12-04	MPC-2023-12-04	Phot

Periods

Value	Quality	Side real or Synodic	Author	Reference	Method
237.59	2	Sidereal	Durech	2020A&A...643A..59D	Model
30.0	1	Synodic	Binzel	1987Icar...72..135B	Lightcurve

Spectral Class Data

Class 1	Class 2	Probability of Class 1	Probability of Class 2	Taxonomy	Wavelength	Author	Reference	Method
X	X	0.6644	0.6644	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT