Phemios

10664, 1989 ER2, 1989ER2, 1990 EM, 1990EM, 5187 T-2, 5187T-2, J89E02R, J90E00M, T2S5187

All data for this body: [vot]

MPC data

Name (number)	Phemios (10664)
a	5.20783
e	0.03286
i / sin(i)	8.5678 / 0.14898
q	5.03669
Q	5.37897
ω	233.5074
Node	240.1150
m	54.5908
n	0.0829
Epoch	2460800.5

n_obs	2497
n_opp	30
Years observed	1954-2025
rms	0.73

Best values

	Value	Standard error
Parent

a_p
e_p
sin(i_p)
G	0.150
H	11.420
Mass
D	30.76	0.458
pV	0.068	0.0059

	Value
Rotational Period	7.870
Period quality	2+
Spectral Class	D
Spectral Class Score	34.136

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
30.48	0.710	0.710	Grav	2011ApJ...742...40G	NEATM
30.96	0.600	0.600	Grav	2012ApJ...759...49G	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.067	0.0070	0.0070	Grav	2012ApJ...759...49G	NEATM
0.069	0.0110	0.0110	Grav	2011ApJ...742...40G	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
7.874	2+	Synodic	Kalup	2021ApJS..254....7K	Lightcurve

Spectral Class Data

Class 1	Class 2	Probability of Class 1	Probability of Class 2	Taxonomy	Wavelength	Author	Reference	Method
D		0.250		Bus-Demeo	VIS	Sergeyev	2022A&A...658A.109S	PHOT
D	D	0.1509	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
D	D	0.4506	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
D	D	0.6851	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
D	D	0.7518	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
D	D	0.7707	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
D	D	0.8443	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
D	D	0.8916	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
D	D	0.8944	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT
L	D	0.3257	0.6670	Bus-Demeo	VIS	Sergeyev	2021A&A...652A..59S	PHOT