1991 AC

1991AC, 07821, 1989 SA4, 1989SA4, 1992 GT7, 1992GT7, J89S04A, J91A00C, J92G07T

All data for this body: [vot]

MPC data
Name (number) 1991 AC (7821)
a 2.89020
e 0.01413
i / sin(i) 2.8736 / 0.05013
q 2.84938
Q 2.93103
ω 59.6350
Node 57.7948
m 353.6143
n 0.2006
Epoch 2460800.5
nobs 4094
nopp 27
Years observed 1989-2025
rms 0.70
Best values
[raw, vot]

Value Standard error
Parent Koronis (158)
 
ap 2.888
ep 0.046
sin(ip) 0.037
G 0.150
H 13.040
Mass
D 7.10 0.201
pV 0.266 0.0434
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 15.638
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
158 Koronis 0 Koronis Novakovic 2019EPSC...13.1671N HCM
158 Koronis 605 Koronis 0.2000 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.8884 0.0460 0.0368 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
7.10 0.201 0.201 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.266 0.0434 0.0434 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
13.04 MPC-2023-12-04 MPC-2023-12-04 Phot
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 0.66 Bus VIS Carvano 2010A&A...510A..43C PHOT
S 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S None None Movis NIR Popescu 2018A&A...617A..12P PHOT
S S 0.8863 0.8863 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT