1998 QD21

1998QD21, 1999 XU90, 1999XU90, 48954, J98Q21D, J99X90U

All data for this body: [vot]

MPC data
Name (number) 1998 QD21 (48954)
a 2.40632
e 0.04845
i / sin(i) 2.0042 / 0.03497
q 2.28974
Q 2.52291
ω 290.5793
Node 182.2905
m 275.4909
n 0.2640
Epoch 2460800.5
nobs 2337
nopp 21
Years observed 1998-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.407
ep 0.074
sin(ip) 0.040
G 0.150
H 15.100
Mass
D
pV
Value
Rotational Period 5.000
Period quality
Spectral Class S
Spectral Class Score 21.613
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4069 0.0742 0.0403 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
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
15.10 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
5.4 Synodic Erasmus 2019ApJS..242...15E Lightcurve
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 0.86 Bus VIS Carvano 2010A&A...510A..43C PHOT
S 0.999000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT
S S 0.9839 0.9790 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.9992 0.9790 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
V 0.650 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT