1999 JN81

1999JN81, 2001 BA42, 2001BA42, 42811, J99J81N, K01B42A

All data for this body: [vot]

MPC data
Name (number) 1999 JN81 (42811)
a 1.84373
e 0.14248
i / sin(i) 24.0909 / 0.40819
q 1.58104
Q 2.10643
ω 128.8030
Node 209.3876
m 3.8864
n 0.3937
Epoch 2460800.5
nobs 3681
nopp 18
Years observed 1984-2025
rms 0.59
Best values
[raw, vot]

Value Standard error
Parent
 
ap 1.854
ep 0.136
sin(ip) 0.415
G 0.150
H 14.400
Mass
D 3.17 0.265
pV 0.283 0.0513
Value
Rotational Period 3.900
Period quality 3
Spectral Class D
Spectral Class Score 5.668
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
1.8539 0.1357 0.4151 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.75 0.400 0.400 Nugent 2016AJ....152...63N NEATM
3.40 0.500 0.500 Ali-Lagoa 2017A&A...603A..55A NEATM
3.60 0.500 0.500 Ali-Lagoa 2017A&A...603A..55A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.260 0.0800 0.0800 Ali-Lagoa 2017A&A...603A..55A NEATM
0.290 0.0900 0.0900 Ali-Lagoa 2017A&A...603A..55A NEATM
0.310 0.1000 0.1000 Nugent 2016AJ....152...63N 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
14.40 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
3.897 3- Synodic Warner 2012MPBu...39..245W Lightcurve
3.902 2 Synodic Stephens 2022MPBu...49..314S Lightcurve
3.902 3 Synodic Warner 2008MPBu...35...56W Lightcurve
3.90476 2 Synodic Pal 2020ApJS..247...26P Lightcurve
3.9049 3 Synodic Skiff 2019MPBu...46..458S Lightcurve
3.909 3- Synodic Benishek 2018MPBu...45...82B Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
A D 0.2171 0.1810 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
D D 0.9446 0.1810 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
L D 0.0688 0.1810 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S D 0.6269 0.1810 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT