1990 KC1

1990KC1, 08654, 1977 CE3, 1977CE3, 1984 YK5, 1984YK5, J77C03E, J84Y05K, J90K01C

All data for this body: [vot]

MPC data

Name (number)	1990 KC1 (8654)
a	2.56734
e	0.09211
i / sin(i)	14.4645 / 0.24978
q	2.33087
Q	2.80381
ω	57.2636
Node	111.0229
m	233.7273
n	0.2396
Epoch	2460800.5

n_obs	4628
n_opp	28
Years observed	1954-2025
rms	0.60

Best values

	Value	Standard error
Parent	Eunomia (15)

a_p	2.568
e_p	0.136
sin(i_p)	0.236
G	0.150
H	13.410
Mass
D	6.36	0.072
pV	0.189	0.0180

	Value
Rotational Period	6.941
Period quality	2
Spectral Class	S
Spectral Class Score	5.684

Family data

Parent	Parent name	Family ID	Family name	C_j	Author	Reference	Method
15	Eunomia	0	Eunomia		Novakovic	2019EPSC...13.1671N	HCM
15	Eunomia	502	Eunomia	-0.9200	Nesvorny	doi.org/10.26033/6cg5-pt13	HCM-2020-08-14

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.5677	0.1361	0.2362	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
6.31	0.100	0.100	Masiero	2014ApJ...791..121M	NEATM
6.41	0.103	0.103	Masiero	2011ApJ...741...68M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.188	0.0225	0.0225	Masiero	2011ApJ...741...68M	NEATM
0.190	0.0300	0.0300	Masiero	2014ApJ...791..121M	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
13.41			MPC-2023-12-04	MPC-2023-12-04	Phot

Periods

Value	Quality	Side real or Synodic	Author	Reference	Method
6.94119	2	Sidereal	Durech	2018A&A...617A..57D	Model

Spectral Class Data

Class 1	Class 2	Probability of Class 1	Probability of Class 2	Taxonomy	Wavelength	Author	Reference	Method
K	S	0.3682	0.6070	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
L	S	0.2908	0.6070	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
S	S	0.9473	0.6070	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT