Alfreda

01375, 1916 WK, 1916WK, 1931 TV3, 1931TV3, 1933 FC, 1933FC, 1935 UB, 1935UB, J16W00K, J31T03V, J33F00C, J35U00B

All data for this body: [vot]

MPC data
Name (number) Alfreda (1375)
a 2.44711
e 0.07046
i / sin(i) 5.8201 / 0.10141
q 2.27468
Q 2.61954
ω 31.5041
Node 52.7373
m 100.5933
n 0.2575
Epoch 2460800.5
nobs 4780
nopp 45
Years observed 1931-2025
rms 0.63
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.448
ep 0.079
sin(ip) 0.089
G 0.150
H 11.460
Mass
D 14.56 0.088
pV 0.196 0.0124
Value
Rotational Period 19.100
Period quality 3-
Spectral Class S
Spectral Class Score 30.922
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4478 0.0793 0.0893 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
13.93 0.170 0.170 Masiero 2014ApJ...791..121M NEATM
14.09 0.250 0.250 Masiero 2014ApJ...791..121M NEATM
14.19 2.840 2.840 Ali-Lagoa 2018A&A...612A..85A NEATM
14.53 0.530 0.530 Usui 2011PASJ...63.1117U NEATM
14.69 0.192 0.192 Masiero 2011ApJ...741...68M NEATM
15.09 0.144 0.144 Masiero 2011ApJ...741...68M NEATM
15.65 3.130 3.130 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.180 0.0250 0.0250 Masiero 2011ApJ...741...68M NEATM
0.190 0.0304 0.0304 Masiero 2011ApJ...741...68M NEATM
0.200 0.0200 0.0200 Masiero 2014ApJ...791..121M NEATM
0.208 0.0830 0.0830 Ali-Lagoa 2018A&A...612A..85A NEATM
0.210 0.0300 0.0300 Masiero 2014ApJ...791..121M NEATM
0.253 0.1010 0.1010 Ali-Lagoa 2018A&A...612A..85A 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
11.46 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
12.0 2 Synodic Behrend LCDB Lightcurve
19.1125 2 Sidereal Durech 2020A&A...643A..59D Model
19.14 3- Synodic Pligge 2011MPBu...38....5P Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S Bus-DeMeo VIS Bourdelle de Micas 2024A&A...682A..64B SPEC
S Tholen VIS Xu 1995Icar..115....1X SPEC
S 0.987 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S 1.000000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC