1999 NE21

1999NE21, 40360, J99N21E

All data for this body: [vot]

MPC data
Name (number) 1999 NE21 (40360)
a 2.31585
e 0.15616
i / sin(i) 4.6674 / 0.08137
q 1.95421
Q 2.67749
ω 7.9077
Node 343.3872
m 73.1877
n 0.2797
Epoch 2460800.5
nobs 1524
nopp 20
Years observed 1991-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent Flora (8)
 
ap 2.315
ep 0.114
sin(ip) 0.083
G 0.150
H 15.710
Mass
D 2.43 0.117
pV 0.273 0.0701
Value
Rotational Period 6.290
Period quality 2
Spectral Class S
Spectral Class Score 7.999
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
8 Flora 402 Flora 0.5200 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3150 0.1140 0.0826 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.43 0.117 0.117 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.273 0.0701 0.0701 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
15.71 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
6.295 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
6.29508 2 Sidereal Durech 2020A&A...643A..59D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S 0.35 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.8831 0.8831 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT