1991 RY21

1991RY21, 09347, 1979 FH4, 1979FH4, 1996 XY30, 1996XY30, J79F04H, J91R21Y, J96X30Y

All data for this body: [vot]

MPC data
Name (number) 1991 RY21 (9347)
a 2.40903
e 0.15871
i / sin(i) 3.3094 / 0.05773
q 2.02670
Q 2.79137
ω 128.7446
Node 101.8832
m 95.7959
n 0.2636
Epoch 2460800.5
nobs 5938
nopp 25
Years observed 1979-2025
rms 0.56
Best values
[raw, vot]

Value Standard error
Parent Nysa (44)
 
ap 2.410
ep 0.179
sin(ip) 0.042
G 0.150
H 13.880
Mass
D 5.60 0.266
pV 0.059 0.0108
Value
Rotational Period 4.020
Period quality 2
Spectral Class None
Spectral Class Score
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
135 Hertha 0 Hertha Novakovic 2019EPSC...13.1671N HCM
44 Nysa 405 Nysa-Polana -0.2500 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4105 0.1787 0.0423 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
11.23 1.000 1.000 Tedesco 2002AJ....123.1056T STM
5.18 0.276 0.276 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.051 0.0110 0.0110 Tedesco 2002AJ....123.1056T STM
0.262 0.0569 0.0569 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
13.88 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
3.713 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve
3.713 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
4.028 2 Synodic Clark 2015MPBu...42..163C Lightcurve