Callahan

19741, 1978 RQ8, 1978RQ8, 2000 AN141, 2000AN141, J78R08Q, K00AE1N

All data for this body: [vot]

MPC data
Name (number) Callahan (19741)
a 2.24783
e 0.13017
i / sin(i) 8.0483 / 0.14001
q 1.95523
Q 2.54043
ω 227.3721
Node 167.3194
m 262.7199
n 0.2925
Epoch 2460800.5
nobs 3325
nopp 24
Years observed 1978-2025
rms 0.65
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.248
ep 0.125
sin(ip) 0.146
G 0.150
H 14.600
Mass
D 3.88 0.166
pV 0.224 0.0439
Value
Rotational Period 7.260
Period quality 2
Spectral Class L
Spectral Class Score 2.916
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2475 0.1252 0.1458 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.88 0.166 0.166 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.224 0.0439 0.0439 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
14.60 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
7.268 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
7.27 2 Synodic Yeh 2020AJ....160...73Y Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
L 0.486 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT