Anacostia

00980, 1917 YC, 1917YC, 1921 WG, 1921WG, J17Y00C, J21W00G

All data for this body: [vot]

MPC data
Name (number) Anacostia (980)
a 2.74167
e 0.20170
i / sin(i) 15.8959 / 0.27389
q 2.18869
Q 3.29465
ω 69.7529
Node 285.7621
m 293.2884
n 0.2171
Epoch 2460800.5
nobs 3744
nopp 51
Years observed 1929-2025
rms 0.69
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.741
ep 0.140
sin(ip) 0.298
G 0.150
H 7.890
Mass 7.616e+17 1.725e+17
D 79.51 0.450
pV 0.173 0.0047
Value
Rotational Period 20.110
Period quality 3
Spectral Class L
Spectral Class Score 52.706
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
729 Watsonia 0 Watsonia Novakovic 2019EPSC...13.1671N HCM
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7410 0.1404 0.2982 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.0300e+18 Folkner 2014IPNPR.196C...1F Ephem
4.9327e+17 2.4390e+17 2.4390e+17 Fienga INPOP19a Ephem
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
70.00 nan nan Marchis 2006Icar..185...39M AO
71.11 7.110 7.110 Ali-Lagoa 2018A&A...612A..85A NEATM
74.68 0.650 0.650 Masiero 2014ApJ...791..121M NEATM
75.37 2.302 2.302 Ryan&Woodward 2010AJ....140..933R IRAS-STM
78.26 0.950 0.950 Usui 2011PASJ...63.1117U NEATM
86.19 1.600 1.600 Tedesco 2002AJ....123.1056T STM
87.71 3.909 3.909 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
95.57 1.195 1.195 Masiero 2011ApJ...741...68M NEATM
97.93 9.790 9.790 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.136 0.0270 0.0270 Ali-Lagoa 2018A&A...612A..85A NEATM
0.140 0.0125 0.0125 Masiero 2011ApJ...741...68M NEATM
0.168 0.0145 0.0145 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.172 0.0060 0.0060 Tedesco 2002AJ....123.1056T STM
0.226 0.0139 0.0139 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.230 0.0600 0.0600 Masiero 2014ApJ...791..121M NEATM
0.258 0.0520 0.0520 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
7.89 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
20.1 1 Synodic Devogele 2017A&A...607A.119D Lightcurve
20.1 2- Synodic Behrend LCDB Lightcurve
20.113 2 Synodic Marciniak LCDB Lightcurve
20.1137 2+ Synodic Devogele 2017A&A...607A.119D Lightcurve
20.116 2- Synodic Behrend LCDB Lightcurve
20.117 3 Synodic Harris 1989Icar...81..314H Lightcurve
20.124 2 Synodic Devogele 2017A&A...607A.119D Lightcurve
20.126 2 Synodic Behrend LCDB Lightcurve
20.16 2- Synodic Devogele 2017A&A...607A.119D Lightcurve
20.17 2 Synodic Devogele 2017A&A...607A.119D Lightcurve
21.0 2 Synodic McFaul 1981MPBu....8...19M 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 Devogele 2018Icar..304...31D SPEC
L Bus-DeMeo VISNIR Hasegawa 2017PASJ...69...99H SPEC
L Bus VIS Bus 2002Icar..158..146B SPEC
L 0.951 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S L 0.620000 0.200000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
T Howell VISNIR Howell 1994JGR....9910847H PHOT