Seimei

05541, 1976 ST5, 1976ST5, 1976 UH16, 1976UH16, 1987 SJ11, 1987SJ11, J76S05T, J76U16H, J87S11J

All data for this body: [vot]

MPC data

Name (number)	Seimei (5541)
a	3.18671
e	0.14153
i / sin(i)	12.8869 / 0.22303
q	2.73568
Q	3.63774
ω	199.5995
Node	193.0491
m	202.7968
n	0.1733
Epoch	2460800.5

n_obs	5516
n_opp	31
Years observed	1953-2025
rms	0.57

Best values

	Value	Standard error
Parent

a_p	3.185
e_p	0.128
sin(i_p)	0.222
G	0.150
H	12.480
Mass
D	13.05	0.156
pV	0.148	0.0162

	Value
Rotational Period	25.800
Period quality	2
Spectral Class	C
Spectral Class Score	7.742

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
3.1849	0.1281	0.2215	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
12.69	4.180	4.180	Nugent	2016AJ....152...63N	NEATM
13.25	0.230	0.230	Masiero	2014ApJ...791..121M	NEATM
13.80	0.240	0.240	Masiero	2011ApJ...741...68M	NEATM
9.36	0.470	0.470	Masiero	2012ApJ...759L...8M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.110	0.1000	0.1000	Nugent	2016AJ....152...63N	NEATM
0.135	0.0206	0.0206	Masiero	2011ApJ...741...68M	NEATM
0.150	0.0300	0.0300	Masiero	2014ApJ...791..121M	NEATM
0.292	0.0640	0.0640	Masiero	2012ApJ...759L...8M	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
12.48			MPC-2023-12-04	MPC-2023-12-04	Phot

Periods

Value	Quality	Side real or Synodic	Author	Reference	Method
25.82	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve

Spectral Class Data

Class 1	Class 2	Probability of Class 1	Probability of Class 2	Taxonomy	Wavelength	Author	Reference	Method
C				DeMeo-Carry	VIS	DeMeo	2013Icar..226..723D	PHOT
C		0.957		Bus-Demeo	VIS	Sergeyev	2022A&A...658A.109S	PHOT
X		0.26		Bus	VIS	Carvano	2010A&A...510A..43C	PHOT
X	X	0.8328	0.4070	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT