Sphinx

00896, 1918 PE, 1918PE, J18P00E

All data for this body: [vot]

MPC data
Name (number) Sphinx (896)
a 2.28506
e 0.16477
i / sin(i) 8.1986 / 0.14260
q 1.90856
Q 2.66156
ω 2.1023
Node 254.0757
m 5.1592
n 0.2853
Epoch 2460800.5
nobs 7478
nopp 41
Years observed 1918-2025
rms 0.55
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.285
ep 0.166
sin(ip) 0.152
G 0.150
H 11.740
Mass
D 12.37 0.059
pV 0.195 0.0083
Value
Rotational Period 21.030
Period quality 2+
Spectral Class S
Spectral Class Score 38.624
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2852 0.1658 0.1518 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.67 0.486 0.486 Ryan&Woodward 2010AJ....140..933R IRAS-STM
11.97 0.070 0.070 Masiero 2014ApJ...791..121M NEATM
12.59 2.110 2.110 Nugent 2016AJ....152...63N NEATM
13.07 0.500 0.500 Tedesco 2002AJ....123.1056T STM
13.32 0.122 0.122 Masiero 2011ApJ...741...68M NEATM
14.45 0.350 0.350 Usui 2011PASJ...63.1117U NEATM
15.15 1.510 1.510 Ali-Lagoa 2018A&A...612A..85A NEATM
16.47 1.238 1.238 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.128 0.0213 0.0213 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.188 0.0380 0.0380 Ali-Lagoa 2018A&A...612A..85A NEATM
0.192 0.0127 0.0127 Masiero 2011ApJ...741...68M NEATM
0.197 0.0170 0.0170 Tedesco 2002AJ....123.1056T STM
0.240 0.0500 0.0500 Masiero 2014ApJ...791..121M NEATM
0.250 0.1100 0.1100 Nugent 2016AJ....152...63N NEATM
0.298 0.0269 0.0269 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
11.74 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
12.95198 2 Sidereal Martikainen 2021A&A...649A..98M Model
12.95209 2 Sidereal Durech 2018A&A...617A..57D Model
21.038 2+ Synodic Polakis 2018MPBu...45..347P Lightcurve
26.27 1 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
S Bus-DeMeo VISNIR Bourdelle de Micas 2024A&A...682A..64B SPEC
S Tholen VIS Alvarez-Candal 2006A&A...459..969A SPEC
S 0.954 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S 0.980000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
S S DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT