Showa

04973, 1978 CF, 1978CF, 1981 WK7, 1981WK7, 1987 SH14, 1987SH14, 1990 FT, 1990FT, J78C00F, J81W07K, J87S14H, J90F00T

All data for this body: [vot]

MPC data
Name (number) Showa (4973)
a 3.42486
e 0.07770
i / sin(i) 18.9247 / 0.32433
q 3.15876
Q 3.69096
ω 129.9623
Node 352.7914
m 246.2576
n 0.1555
Epoch 2460800.5
nobs 5108
nopp 29
Years observed 1971-2025
rms 0.59
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.420
ep 0.129
sin(ip) 0.328
G 0.150
H 11.670
Mass
D 28.41 0.379
pV 0.064 0.0075
Value
Rotational Period
Period quality None
Spectral Class D
Spectral Class Score 7.916
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.4200 0.1291 0.3279 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
24.84 2.700 2.700 Tedesco 2002AJ....123.1056T STM
27.96 0.423 0.423 Masiero 2011ApJ...741...68M NEATM
30.77 6.150 6.150 Ali-Lagoa 2018A&A...612A..85A NEATM
30.82 0.920 0.920 Usui 2011PASJ...63.1117U NEATM
31.53 6.310 6.310 Ali-Lagoa 2018A&A...612A..85A NEATM
31.96 12.190 12.190 Nugent 2016AJ....152...63N NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.040 0.0700 0.0700 Nugent 2016AJ....152...63N NEATM
0.047 0.0190 0.0190 Ali-Lagoa 2018A&A...612A..85A NEATM
0.050 0.0200 0.0200 Ali-Lagoa 2018A&A...612A..85A NEATM
0.068 0.0097 0.0097 Masiero 2011ApJ...741...68M NEATM
0.086 0.0230 0.0230 Tedesco 2002AJ....123.1056T STM
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
11.67 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 Tholen VIS Lagerkvist 2005A&A...432..349L SPEC
D 0.486 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT