Alexandrinus

08969, 1218 T-2, 1218T-2, 1981 YJ1, 1981YJ1, 1990 ET5, 1990ET5, J81Y01J, J90E05T, T2S1218

All data for this body: [vot]

MPC data
Name (number) Alexandrinus (8969)
a 2.40758
e 0.07726
i / sin(i) 0.9665 / 0.01687
q 2.22158
Q 2.59357
ω 282.7085
Node 154.3433
m 229.0125
n 0.2638
Epoch 2460800.5
nobs 3330
nopp 28
Years observed 1955-2025
rms 0.70
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.407
ep 0.085
sin(ip) 0.019
G 0.150
H 14.320
Mass
D 4.24 0.080
pV 0.247 0.0327
Value
Rotational Period 4.690
Period quality 2
Spectral Class S
Spectral Class Score 5.868
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4071 0.0850 0.0188 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.24 0.080 0.080 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.247 0.0327 0.0327 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
14.32 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
4.690237 2 Sidereal Durech 2018A&A...617A..57D Model
4.69026 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 0.978 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT