1999 SD20

1999SD20, 1998 HL140, 1998HL140, 40736, J98HE0L, J99S20D

All data for this body: [vot]

MPC data
Name (number) 1999 SD20 (40736)
a 2.58537
e 0.18766
i / sin(i) 14.6301 / 0.25258
q 2.10021
Q 3.07054
ω 252.4619
Node 57.2514
m 100.6469
n 0.2371
Epoch 2460800.5
nobs 2280
nopp 22
Years observed 1994-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent Eunomia (15)
 
ap 2.585
ep 0.145
sin(ip) 0.244
G 0.150
H 14.570
Mass
D 6.34 0.114
pV 0.110 0.0079
Value
Rotational Period
Period quality None
Spectral Class D
Spectral Class Score 4.076
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
15 Eunomia 502 Eunomia -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
2.5848 0.1450 0.2440 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.17 2.030 2.030 Nugent 2016AJ....152...63N NEATM
6.35 0.114 0.114 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.110 0.0079 0.0079 Masiero 2011ApJ...741...68M NEATM
0.540 0.2600 0.2600 Nugent 2016AJ....152...63N 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
14.57 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
D D 0.1361 0.4230 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
D D 0.5433 0.4230 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
XD 0.08 Bus VIS Carvano 2010A&A...510A..43C PHOT