Alexandra

00054, 1858 RA, 1858RA, 1950 BT, 1950BT, 1974 HG1, 1974HG1, I58R00A, J50B00T, J74H01G

All data for this body: [vot]

MPC data
Name (number) Alexandra (54)
a 2.71441
e 0.19728
i / sin(i) 11.8111 / 0.20469
q 2.17891
Q 3.24992
ω 345.9711
Node 313.0601
m 143.0039
n 0.2204
Epoch 2460800.5
nobs 9745
nopp 65
Years observed 1863-2025
rms 0.52
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.711
ep 0.189
sin(ip) 0.212
G 0.150
H 7.960
Mass 5.542e+18 7.102e+17
D 154.48 1.099
pV 0.052 0.0014
Value
Rotational Period 7.020
Period quality 3
Spectral Class C
Spectral Class Score 21.800
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7105 0.1889 0.2116 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.0300e+19 1.7400e+18 1.7400e+18 Fienga 2011CeMDA.111..363F Ephem
1.0800e+19 6.1100e+18 6.1100e+18 Zielenbach 2011AJ....142..120Z Deflec
1.6687e+19 2.1475e+18 2.1475e+18 Fienga 2013arXiv1301.1510F Ephem
1.7400e+18 3.1900e+18 3.1900e+18 Zielenbach 2011AJ....142..120Z Deflec
2.4991e+18 9.5109e+17 9.5109e+17 Fienga INPOP19a Ephem
2.9400e+18 3.1500e+18 3.1500e+18 Zielenbach 2011AJ....142..120Z Deflec
3.7800e+18 Folkner 2014IPNPR.196C...1F Ephem
6.4400e+18 6.9500e+18 6.9500e+18 Zielenbach 2011AJ....142..120Z Deflec
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
127.35 35.100 35.100 Nugent 2016AJ....152...63N NEATM
128.00 11.000 11.000 Hanus 2013Icar..226.1045H AO/LC
137.38 13.740 13.740 Ali-Lagoa 2018A&A...612A..85A NEATM
138.54 46.880 46.880 Masiero 2021PSJ.....2..162M NEATM
142.00 9.000 9.000 Durech 2011Icar..214..652D OCCULT
142.00 14.758 14.758 Masiero 2011ApJ...741...68M NEATM
143.00 5.000 5.000 Hanus 2017A&A...601A.114H AO/OCCULT/LC
144.32 32.010 32.010 Masiero 2020PSJ.....1....5M NEATM
144.46 1.800 1.800 Usui 2011PASJ...63.1117U NEATM
152.48 15.250 15.250 Ali-Lagoa 2018A&A...612A..85A NEATM
160.12 1.860 1.860 Masiero 2012ApJ...759L...8M NEATM
161.26 51.560 51.560 Masiero 2021PSJ.....2..162M NEATM
165.75 3.400 3.400 Tedesco 2002AJ....123.1056T STM
177.42 4.559 4.559 Ryan&Woodward 2010AJ....140..933R IRAS-STM
177.68 7.551 7.551 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.043 0.0180 0.0320 Masiero 2021PSJ.....2..162M NEATM
0.048 0.0240 0.0240 Masiero 2020PSJ.....1....5M NEATM
0.048 0.0042 0.0042 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.048 0.0025 0.0025 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.049 0.0082 0.0082 Masiero 2011ApJ...741...68M NEATM
0.051 0.0270 0.0580 Masiero 2021PSJ.....2..162M NEATM
0.056 0.0020 0.0020 Tedesco 2002AJ....123.1056T STM
0.059 0.0140 0.0140 Masiero 2012ApJ...759L...8M NEATM
0.060 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.061 0.0120 0.0120 Ali-Lagoa 2018A&A...612A..85A NEATM
0.076 0.0150 0.0150 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
7.96 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
7.021 3 Synodic Behrend LCDB Lightcurve
7.02252 3 Synodic Behrend LCDB Lightcurve
7.02263 2 Sidereal Torppa 2008Icar..198...91T Model
7.02264 2 Sidereal Hanus 2013Icar..226.1045H Model
7.02264 2 Sidereal Hanus 2016A&A...586A.108H Model
7.022641 2 Sidereal Durech LCDB Model
7.022642 2 Sidereal Hanus 2017A&A...601A.114H Model
7.022649 2 Sidereal Durech 2011Icar..214..652D Model
7.0227 3 Synodic Higgins 2009MPBu...36..159H Lightcurve
7.0234 2 Sidereal Durech 2023A&A...675A..24D Model
7.024 3 Synodic Belskaya 1993A&AS..101..507B Lightcurve
7.026 3 Synodic Farfan 2022MPBu...49..229F Lightcurve
7.028 3 Synodic Warner 2008MPBu...35..167W Lightcurve
7.04 2 Synodic Van Houten Groeneveld 1979A&AS...35..223V Lightcurve
7.04 3 Synodic Di Martino 1987Icar...69..338D Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C 0.960000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
C Bus VIS Fornasier 2014Icar..233..163F SPEC
C Tholen VIS Fornasier 2014Icar..233..163F SPEC
C 1.000000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
Cgh Bus-DeMeo VISNIR DeMeo 2009Icar..202..160D SPEC
P 0.940000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
X Bus VIS Bus 2002Icar..158..146B SPEC
X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT