Sphinx

00896, 1918 PE, 1918PE, J18P00E

All data for this body: [vot]

MPC data

Name (number)	Sphinx (896)
a	2.28468
e	0.16444
i / sin(i)	8.1982 / 0.14260
q	1.90898
Q	2.66037
ω	2.1930
Node	254.0759
m	193.8045
n	0.2854
Epoch	2460200.5

n_obs	6484
n_opp	40
Years observed	1918-2023
rms	0.45

Best values

	Value	Standard error
Parent

a_p	2.285
e_p	0.166
sin(i_p)	0.152

	Value	Standard error
G	0.150
H	11.780
Mass
D	12.37	0.059
pV	0.195	0.0083

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.2852	0.1658	0.1518	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Oct-2022

Diameter data

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

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

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.15			MPC-2023-12-94	MPC-2023-12-94	Phot

H data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
11.78			MPC-2023-12-04	MPC-2023-12-04	Phot

Period data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
12.95			Martikainen	2021A&A...649A..98M	Model
12.95			Durech	2018A&A...617A..57D	Model
21.04			Polakis	2018MPBu...45..347P	Lightcurve
26.27			Behrend	LCDB	Lightcurve