Irma

00177, 1877 VA, 1877VA, 1900 UB, 1900UB, 1900 VA, 1900VA, 1912 HE, 1912HE, 1937 UA, 1937UA, 1962 DB, 1962DB, I77V00A, J00U00B, J00V00A, J12H00E, J37U00A, J62D00B

All data for this body: [vot]

MPC data
Name (number) Irma (177)
a 2.77040
e 0.23423
i / sin(i) 1.3815 / 0.02411
q 2.12148
Q 3.41931
ω 39.7016
Node 346.9259
m 4.5133
n 0.2137
Epoch 2460800.5
nobs 4920
nopp 58
Years observed 1877-2025
rms 0.74
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.770
ep 0.199
sin(ip) 0.038
G 0.150
H 9.630
Mass 2.486e+17 6.798e+16
D 68.56 0.244
pV 0.050 0.0014
Value
Rotational Period 13.850
Period quality 3
Spectral Class Ch
Spectral Class Score 10.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
177 Irma -1 Irma -1.0000 Nesvorny 2024ApJS..274...25N HCM-2024
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7699 0.1992 0.0384 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.9321e+17 9.6134e+16 9.6134e+16 Fienga INPOP19a Ephem
3.0400e+17 Folkner 2014IPNPR.196C...1F Ephem
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
102.40 18.700 18.700 Nugent 2016AJ....152...63N NEATM
67.40 15.740 15.740 Masiero 2021PSJ.....2..162M NEATM
67.42 0.290 0.290 Nugent 2016AJ....152...63N NEATM
68.52 24.302 24.302 Masiero 2017AJ....154..168M NEATM
68.64 6.860 6.860 Ali-Lagoa 2018A&A...612A..85A NEATM
69.05 0.650 0.650 Masiero 2014ApJ...791..121M NEATM
70.82 7.080 7.080 Ali-Lagoa 2018A&A...612A..85A NEATM
72.31 2.478 2.478 Masiero 2011ApJ...741...68M NEATM
73.08 0.810 0.810 Usui 2011PASJ...63.1117U NEATM
73.22 1.600 1.600 Tedesco 2002AJ....123.1056T STM
73.32 17.490 17.490 Masiero 2020PSJ.....1....5M NEATM
73.36 8.585 8.585 Ryan&Woodward 2010AJ....140..933R MSX-STM
74.79 4.624 4.624 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
77.08 1.899 1.899 Ryan&Woodward 2010AJ....140..933R IRAS-STM
78.91 11.022 11.022 Ryan&Woodward 2010AJ....140..933R MSX-NEATM
83.68 22.240 22.240 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.020 0.0100 0.0100 Nugent 2016AJ....152...63N NEATM
0.032 0.0260 0.0260 Masiero 2012ApJ...759L...8M NEATM
0.035 0.0490 0.0490 Masiero 2020PSJ.....1....5M NEATM
0.038 0.0130 0.0200 Masiero 2021PSJ.....2..162M NEATM
0.042 0.0254 0.0254 Masiero 2017AJ....154..168M NEATM
0.048 0.0024 0.0024 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.050 0.0100 0.0100 Nugent 2016AJ....152...63N NEATM
0.051 0.0062 0.0062 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.052 0.0109 0.0109 Ryan&Woodward 2010AJ....140..933R MSX-NEATM
0.053 0.0020 0.0020 Tedesco 2002AJ....123.1056T STM
0.054 0.0095 0.0095 Masiero 2011ApJ...741...68M NEATM
0.055 0.0110 0.0110 Ali-Lagoa 2018A&A...612A..85A NEATM
0.056 0.0111 0.0111 Ryan&Woodward 2010AJ....140..933R MSX-STM
0.058 0.0120 0.0120 Ali-Lagoa 2018A&A...612A..85A NEATM
0.060 0.0100 0.0100 Masiero 2014ApJ...791..121M 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
9.63 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
13.85421 2+ Synodic Behrend LCDB Lightcurve
13.855 2+ Synodic Pilcher 2013MPBu...40..161P Lightcurve
13.856 3- Synodic Pilcher 2012MPBu...39...57P Lightcurve
13.858 3 Synodic Pilcher 2013MPBu...40..161P Lightcurve
14.208 2 Synodic Wetterer 1999MPBu...26...30W Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C 0.789 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
P 0.990000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
C 0.920000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
Caa Tholen VIS Lazzaro 2004Icar..172..179L SPEC
Ch Bus VIS Bus 2002Icar..158..146B SPEC
Ch Bus VIS Lazzaro 2004Icar..172..179L SPEC