Ilsewa

00979, 1916 KD, 1916KD, 1922 MA, 1922MA, 1923 XB, 1923XB, 1932 EG1, 1932EG1, 1951 TW, 1951TW, 1966 HO, 1966HO, J16K00D, J22M00A, J23X00B, J32E01G, J51T00W, J66H00O

All data for this body: [vot]

MPC data
Name (number) Ilsewa (979)
a 3.16118
e 0.13990
i / sin(i) 10.1066 / 0.17548
q 2.71893
Q 3.60342
ω 116.4280
Node 230.5690
m 78.6948
n 0.1754
Epoch 2460800.5
nobs 7670
nopp 46
Years observed 1922-2025
rms 0.54
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.152
ep 0.115
sin(ip) 0.194
G 0.150
H 9.840
Mass
D 38.67 0.235
pV 0.160 0.0092
Value
Rotational Period 42.600
Period quality 3
Spectral Class T
Spectral Class Score 10.000
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1523 0.1151 0.1935 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
33.51 1.544 1.544 Ryan&Woodward 2010AJ....140..933R IRAS-STM
35.74 0.600 0.600 Masiero 2014ApJ...791..121M NEATM
36.82 2.500 2.500 Tedesco 2002AJ....123.1056T STM
38.80 0.550 0.550 Usui 2011PASJ...63.1117U NEATM
38.97 3.900 3.900 Ali-Lagoa 2018A&A...612A..85A NEATM
39.54 0.298 0.298 Masiero 2011ApJ...741...68M NEATM
40.54 4.050 4.050 Ali-Lagoa 2018A&A...612A..85A NEATM
42.90 5.277 5.277 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.130 0.0228 0.0228 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.139 0.0213 0.0213 Masiero 2011ApJ...741...68M NEATM
0.152 0.0300 0.0300 Ali-Lagoa 2018A&A...612A..85A NEATM
0.157 0.0240 0.0240 Tedesco 2002AJ....123.1056T STM
0.165 0.0330 0.0330 Ali-Lagoa 2018A&A...612A..85A NEATM
0.170 0.0500 0.0500 Masiero 2014ApJ...791..121M NEATM
0.191 0.0168 0.0168 Ryan&Woodward 2010AJ....140..933R IRAS-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
9.84 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
19.0 1 Synodic Behrend LCDB Lightcurve
42.61 3 Synodic Stephens 2013MPBu...40...34S Lightcurve
42.8982 2 Sidereal Durech 2016A&A...587A..48D Model
42.899 2 Sidereal Durech 2023A&A...675A..24D Model
42.97 3 Synodic Ferrero 2013MPBu...40...31F Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
L Bus-DeMeo VISNIR Hasegawa 2021PASJ...73..240H PHOT
M 0.980000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
T Bus VIS Lazzaro 2004Icar..172..179L SPEC
T Tholen VIS Lazzaro 2004Icar..172..179L SPEC
X 0.990 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT