1991 PK31

1991PK31, 16542, 1991 RK31, 1991RK31, 1999 CM17, 1999CM17, J91P31K, J91R31K, J99C17M

All data for this body: [vot]

MPC data
Name (number) 1991 PK31 (16542)
a 3.17368
e 0.18434
i / sin(i) 12.8940 / 0.22315
q 2.58865
Q 3.75870
ω 67.4290
Node 338.9622
m 284.1599
n 0.1743
Epoch 2460800.5
nobs 2330
nopp 22
Years observed 1991-2025
rms 0.70
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.164
ep 0.162
sin(ip) 0.242
G 0.150
H 13.570
Mass
D 10.27 0.166
pV 0.088 0.0099
Value
Rotational Period 8.412
Period quality 2
Spectral Class L
Spectral Class Score 5.020
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1642 0.1616 0.2416 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.27 0.166 0.166 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.088 0.0099 0.0099 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
13.57 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
8.4129 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
D 0.07 Bus VIS Carvano 2010A&A...510A..43C PHOT
L DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
L L 0.5033 0.5033 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT