1991 PC18

1991PC18, 08281, 1993 BX, 1993BX, J91P18C, J93B00X

All data for this body: [vot]

MPC data
Name (number) 1991 PC18 (8281)
a 2.80489
e 0.08082
i / sin(i) 6.1922 / 0.10786
q 2.57820
Q 3.03157
ω 125.6333
Node 295.5503
m 346.0258
n 0.2098
Epoch 2460800.5
nobs 3499
nopp 26
Years observed 1953-2025
rms 0.69
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.806
ep 0.066
sin(ip) 0.126
G 0.150
H 13.360
Mass
D 13.22 0.070
pV 0.052 0.0038
Value
Rotational Period 12.630
Period quality 2
Spectral Class X
Spectral Class Score 1.662
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.8061 0.0657 0.1259 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
11.21 3.000 3.000 Masiero 2021PSJ.....2..162M NEATM
11.29 2.880 2.880 Nugent 2016AJ....152...63N NEATM
11.94 3.941 3.941 Masiero 2017AJ....154..168M NEATM
13.20 0.070 0.070 Masiero 2011ApJ...741...68M NEATM
13.38 5.690 5.690 Masiero 2012ApJ...759L...8M NEATM
18.61 1.070 1.070 Usui 2011PASJ...63.1117U NEATM
19.29 3.860 3.860 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.026 0.0100 0.0100 Ali-Lagoa 2018A&A...612A..85A NEATM
0.056 0.0042 0.0042 Masiero 2011ApJ...741...68M NEATM
0.057 0.0340 0.0340 Masiero 2012ApJ...759L...8M NEATM
0.060 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.061 0.0348 0.0348 Masiero 2017AJ....154..168M NEATM
0.070 0.0300 0.0540 Masiero 2021PSJ.....2..162M 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
13.36 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
12.635 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
12.6538 2 Sidereal Durech 2023A&A...675A..24D Model
12.65389 2 Sidereal Durech 2018A&A...617A..57D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
X 0.277 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT