1998 XY91

1998XY91, 1976 UL, 1976UL, 44519, J76U00L, J98X91Y

All data for this body: [vot]

MPC data
Name (number) 1998 XY91 (44519)
a 3.12814
e 0.17918
i / sin(i) 16.5251 / 0.28444
q 2.56763
Q 3.68865
ω 193.8725
Node 256.6356
m 271.6430
n 0.1781
Epoch 2460800.5
nobs 1778
nopp 21
Years observed 1976-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent Tirela (1400)
 
ap 3.132
ep 0.194
sin(ip) 0.291
G 0.150
H 13.750
Mass
D 11.69 0.103
pV 0.055 0.0071
Value
Rotational Period 10.087
Period quality 2
Spectral Class C
Spectral Class Score 1.929
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
1400 Tirela 0 Tirela Novakovic 2019EPSC...13.1671N HCM
1400 Tirela 612 Tirela 0.4500 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1324 0.1942 0.2912 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.98 3.410 3.410 Nugent 2016AJ....152...63N NEATM
11.68 0.103 0.103 Masiero 2011ApJ...741...68M NEATM
12.33 4.110 4.110 Masiero 2021PSJ.....2..162M NEATM
12.68 3.941 3.941 Masiero 2017AJ....154..168M NEATM
14.46 4.970 4.970 Nugent 2016AJ....152...63N NEATM
16.60 7.960 7.960 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.020 0.0200 0.0200 Nugent 2016AJ....152...63N NEATM
0.026 0.0460 0.0460 Masiero 2012ApJ...759L...8M NEATM
0.036 0.0299 0.0299 Masiero 2017AJ....154..168M NEATM
0.039 0.0190 0.0360 Masiero 2021PSJ.....2..162M NEATM
0.040 0.0300 0.0300 Nugent 2016AJ....152...63N NEATM
0.067 0.0087 0.0087 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
13.75 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
10.0877 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C C 0.3215 0.3215 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT