Cofer

1981 UD28, 1981UD28, 1998 QT18, 1998QT18, 23788, J81U28D, J98Q18T

All data for this body: [vot]

MPC data
Name (number) Cofer (23788)
a 2.28608
e 0.14914
i / sin(i) 2.8547 / 0.04980
q 1.94514
Q 2.62703
ω 63.9969
Node 237.8045
m 281.3072
n 0.2851
Epoch 2460800.5
nobs 2827
nopp 22
Years observed 1981-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.287
ep 0.117
sin(ip) 0.063
G 0.150
H 14.510
Mass
D 3.64 0.162
pV 0.278 0.0668
Value
Rotational Period 4.072
Period quality 2
Spectral Class S
Spectral Class Score 9.970
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2865 0.1166 0.0627 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.64 0.162 0.162 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.278 0.0668 0.0668 Masiero 2011ApJ...741...68M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
14.51 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
4.07179 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

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 0.99 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.9983 0.6510 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT