Imperatrix

01200, 1913 EC, 1913EC, 1915 TL, 1915TL, 1924 GC, 1924GC, 1929 CX, 1929CX, 1931 RH, 1931RH, 1950 DC1, 1950DC1, 1957 OY, 1957OY, J13E00C, J15T00L, J24G00C, J29C00X, J31R00H, J50D01C, J57O00Y

All data for this body: [vot]

MPC data
Name (number) Imperatrix (1200)
a 3.05784
e 0.11271
i / sin(i) 4.6149 / 0.08046
q 2.71319
Q 3.40249
ω 53.0557
Node 204.5864
m 267.7314
n 0.1843
Epoch 2460800.5
nobs 6060
nopp 50
Years observed 1915-2025
rms 0.63
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.060
ep 0.132
sin(ip) 0.088
G 0.150
H 10.910
Mass
D 41.03 0.195
pV 0.064 0.0034
Value
Rotational Period 17.760
Period quality 3
Spectral Class Cgx
Spectral Class Score 1.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
10 Hygiea 0 Hygiea Novakovic 2019EPSC...13.1671N HCM
10 Hygiea 601 Hygiea Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.0600 0.1320 0.0881 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
33.85 1.424 1.424 Ryan&Woodward 2010AJ....140..933R IRAS-STM
36.00 0.420 0.420 Masiero 2012ApJ...759L...8M NEATM
37.36 9.710 9.710 Nugent 2016AJ....152...63N NEATM
38.25 11.850 11.850 Masiero 2021PSJ.....2..162M NEATM
39.52 3.900 3.900 Tedesco 2002AJ....123.1056T STM
39.56 12.700 12.700 Nugent 2016AJ....152...63N NEATM
40.75 14.669 14.669 Masiero 2017AJ....154..168M NEATM
41.43 4.140 4.140 Ali-Lagoa 2018A&A...612A..85A NEATM
41.48 4.150 4.150 Ali-Lagoa 2018A&A...612A..85A NEATM
41.92 16.257 16.257 Masiero 2017AJ....154..168M NEATM
42.01 0.390 0.390 Masiero 2014ApJ...791..121M NEATM
42.78 0.309 0.309 Masiero 2011ApJ...741...68M NEATM
43.64 0.610 0.610 Usui 2011PASJ...63.1117U NEATM
44.29 3.065 3.065 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.035 0.0283 0.0283 Masiero 2017AJ....154..168M NEATM
0.035 0.0170 0.0340 Masiero 2021PSJ.....2..162M NEATM
0.037 0.0228 0.0228 Masiero 2017AJ....154..168M NEATM
0.040 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.040 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.051 0.0100 0.0100 Ali-Lagoa 2018A&A...612A..85A NEATM
0.051 0.0100 0.0100 Ali-Lagoa 2018A&A...612A..85A NEATM
0.060 0.0100 0.0100 Masiero 2014ApJ...791..121M NEATM
0.061 0.0118 0.0118 Masiero 2011ApJ...741...68M NEATM
0.061 0.0079 0.0079 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.065 0.0090 0.0090 Masiero 2012ApJ...759L...8M NEATM
0.071 0.0170 0.0170 Tedesco 2002AJ....123.1056T STM
0.099 0.0086 0.0086 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
10.91 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
13.34 2 Synodic Holliday 2001MPBu...28...13H Lightcurve
17.7595 2 Synodic Pal 2020ApJS..247...26P Lightcurve
17.769 3 Synodic Behrend LCDB Lightcurve
17.7778 2 Sidereal Durech 2020A&A...643A..59D Model
17.7779 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
Cgx Kl None None Movis NIR Popescu 2018A&A...617A..12P PHOT