Demiddelaer

01926, 1935 JA, 1935JA, 1959 XD, 1959XD, 1970 LE, 1970LE, 1974 HB, 1974HB, J35J00A, J59X00D, J70L00E, J74H00B

All data for this body: [vot]

MPC data

Name (number)	Demiddelaer (1926)
a	2.65627
e	0.10796
i / sin(i)	13.7208 / 0.23719
q	2.36950
Q	2.94304
ω	91.1105
Node	93.3908
m	171.5260
n	0.2277
Epoch	2460200.5

n_obs	3889
n_opp	28
Years observed	1935-2023
rms	0.46

Best values

	Value	Standard error
Parent	Eunomia (15)

a_p	2.656
e_p	0.141
sin(i_p)	0.224

	Value	Standard error
G	0.150
H	11.100
Mass
D	19.42	0.179
pV	0.125	0.0077
Rotational Period	32.095

Family data

Parent	Parent name	Family ID	Family name	C_j	Author	Reference	Method
15	Eunomia	502	Eunomia	0.4200	Nesvorny	doi.org/10.26033/6cg5-pt13	HCM-2020-08-14

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.6565	0.1407	0.2236	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Oct-2022

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
17.75	0.410	0.410	Masiero	2014ApJ...791..121M	NEATM
18.65	3.730	3.730	Ali-Lagoa	2018A&A...612A..85A	NEATM
19.12	0.590	0.590	Usui	2011PASJ...63.1117U	NEATM
19.67	3.930	3.930	Ali-Lagoa	2018A&A...612A..85A	NEATM
19.90	0.217	0.217	Masiero	2011ApJ...741...68M	NEATM
20.10	1.060	1.060	Masiero	2012ApJ...759L...8M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.103	0.0137	0.0137	Masiero	2011ApJ...741...68M	NEATM
0.130	0.0100	0.0100	Masiero	2014ApJ...791..121M	NEATM
0.174	0.0310	0.0310	Masiero	2012ApJ...759L...8M	NEATM
0.185	0.0740	0.0740	Ali-Lagoa	2018A&A...612A..85A	NEATM
0.206	0.0820	0.0820	Ali-Lagoa	2018A&A...612A..85A	NEATM

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
11.10			MPC-2023-12-04	MPC-2023-12-04	Phot

Period data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
18.50			Behrend	LCDB	Lightcurve
32.09			Polakis	2017MPBu...44..299P	Lightcurve