1991 NP2

1991NP2, 09181, 1977 PB2, 1977PB2, 1991 PD3, 1991PD3, J77P02B, J91N02P, J91P03D

All data for this body: [vot]

MPC data
Name (number) 1991 NP2 (9181)
a 2.31766
e 0.14906
i / sin(i) 6.8502 / 0.11927
q 1.97219
Q 2.66313
ω 350.8970
Node 317.3933
m 39.1470
n 0.2793
Epoch 2460200.5
nobs 2888
nopp 23
Years observed 1977-2023
rms 0.51
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.317
ep 0.116
sin(ip) 0.125
Value Standard error
G 0.150
H 13.920
Mass
D 3.87 0.162
pV 0.356 0.1024
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3173 0.1159 0.1253 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Oct-2022
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.87 0.162 0.162 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.356 0.1024 0.1024 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
13.92 MPC-2023-12-04 MPC-2023-12-04 Phot