Portlandia

00757, 1908 TG, 1908TG, 1912 YA, 1912YA, 1931 CF, 1931CF, J08T00G, J12Y00A, J31C00F

All data for this body: [vot]

MPC data
Name (number) Portlandia (757)
a 2.37319
e 0.10816
i / sin(i) 8.1711 / 0.14213
q 2.11650
Q 2.62988
ω 44.2832
Node 22.4185
m 276.0751
n 0.2696
Epoch 2460800.5
nobs 4756
nopp 48
Years observed 1908-2025
rms 0.73
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.373
ep 0.111
sin(ip) 0.136
G 0.150
H 10.060
Mass
D 32.98 0.178
pV 0.148 0.0072
Value
Rotational Period 6.583
Period quality 3
Spectral Class Xc
Spectral Class Score 30.000
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3732 0.1107 0.1358 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
26.81 1.222 1.222 Ryan&Woodward 2010AJ....140..933R IRAS-STM
32.09 1.400 1.400 Tedesco 2002AJ....123.1056T STM
32.78 6.560 6.560 Ali-Lagoa 2018A&A...612A..85A NEATM
32.80 0.500 0.500 Hanus 2018Icar..309..297H RADIOMETRY_TPM
32.89 0.240 0.240 Masiero 2014ApJ...791..121M NEATM
33.10 0.500 0.500 Hanus 2018Icar..309..297H RADIOMETRY_TPM
33.25 7.140 7.140 Masiero 2021PSJ.....2..162M NEATM
33.62 8.060 8.060 Nugent 2016AJ....152...63N NEATM
34.06 0.470 0.470 Usui 2011PASJ...63.1117U NEATM
36.70 2.272 2.272 Masiero 2011ApJ...741...68M NEATM
37.04 3.700 3.700 Ali-Lagoa 2018A&A...612A..85A NEATM
39.39 3.536 3.536 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.099 0.0193 0.0193 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.110 0.0151 0.0151 Masiero 2011ApJ...741...68M NEATM
0.120 0.1400 0.1400 Nugent 2016AJ....152...63N NEATM
0.132 0.0260 0.0260 Ali-Lagoa 2018A&A...612A..85A NEATM
0.132 0.0500 0.0810 Masiero 2021PSJ.....2..162M NEATM
0.143 0.0140 0.0140 Tedesco 2002AJ....123.1056T STM
0.169 0.0680 0.0680 Ali-Lagoa 2018A&A...612A..85A NEATM
0.206 0.0187 0.0187 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.220 0.0200 0.0200 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
10.06 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
6.579 3 Synodic Stephens 2015MPBu...42..104S Lightcurve
6.58 3 Synodic Lagerkvist 1998A&AS..131...55L Lightcurve
6.5811 2 Sidereal Athanasopoulos 2024A%26A...690A.215A Model
6.58112 2 Sidereal Hanus 2016A&A...586A.108H Model
6.58112 2 Sidereal Martikainen 2021A&A...649A..98M Model
6.58113 2 Sidereal Durech LCDB Model
6.5837 3 Synodic Behrend LCDB Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
L&D D DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT
M 0.900000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
X DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
X X 0.7431 0.0370 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
Xc Xe Bus-DeMeo VISNIR Avdellidou 2022A&A...665L...9A SPEC+PHOT
Xk Bus-DeMeo VISNIR Clark 2009Icar..202..119C SPEC
Xk Bus VIS Bus 2002Icar..158..146B SPEC