1991 SD1

1991SD1, 19181, 1998 GN4, 1998GN4, J91S01D, J98G04N

All data for this body: [vot]

MPC data
Name (number) 1991 SD1 (19181)
a 2.55370
e 0.12900
i / sin(i) 13.8026 / 0.23858
q 2.22428
Q 2.88313
ω 91.7092
Node 132.1609
m 201.9292
n 0.2415
Epoch 2460800.5
nobs 2852
nopp 22
Years observed 1991-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent Eunomia (15)
 
ap 2.552
ep 0.156
sin(ip) 0.231
G 0.150
H 13.970
Mass
D 4.64 0.073
pV 0.248 0.0413
Value
Rotational Period 5.128
Period quality 2
Spectral Class L
Spectral Class Score 1.044
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
15 Eunomia 0 Eunomia Novakovic 2019EPSC...13.1671N HCM
15 Eunomia 502 Eunomia -0.8100 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5524 0.1560 0.2313 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.64 0.073 0.073 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.248 0.0413 0.0413 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
13.97 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
5.12791 2 Sidereal Durech 2018A&A...617A..57D Model
5.12794 2 Sidereal Durech 2023A&A...675A..24D Model
5.12796 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
L 0.174 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT