Baldwin

04831, 1970 GK1, 1970GK1, 1975 ET, 1975ET, 1988 RX11, 1988RX11, J70G01K, J75E00T, J88R11X

All data for this body: [vot]

MPC data

Name (number)	Baldwin (4831)
a	3.08745
e	0.12068
i / sin(i)	0.2630 / 0.00459
q	2.71485
Q	3.46004
ω	144.6639
Node	66.2976
m	29.9672
n	0.1817
Epoch	2460800.5

n_obs	5592
n_opp	31
Years observed	1951-2025
rms	0.60

Best values

	Value	Standard error
Parent	Themis (24)

a_p	3.090
e_p	0.152
sin(i_p)	0.018
G	0.150
H	12.630
Mass
D	18.40	0.116
pV	0.028	0.0025

	Value
Rotational Period	5.000
Period quality	3-
Spectral Class	X
Spectral Class Score	5.394

Family data

Parent	Parent name	Family ID	Family name	C_j	Author	Reference	Method
24	Themis	0	Themis		Novakovic	2019EPSC...13.1671N	HCM
24	Themis	602	Themis	-0.6000	Nesvorny	doi.org/10.26033/6cg5-pt13	HCM-2020-08-14

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
3.0898	0.1519	0.0183	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
18.38	0.117	0.117	Masiero	2011ApJ...741...68M	NEATM
18.46	1.300	1.300	Usui	2011PASJ...63.1117U	NEATM
19.05	3.810	3.810	Ali-Lagoa	2018A&A...612A..85A	NEATM
35.18	3.200	3.200	Tedesco	2002AJ....123.1056T	STM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.016	0.0030	0.0030	Tedesco	2002AJ....123.1056T	STM
0.051	0.0200	0.0200	Ali-Lagoa	2018A&A...612A..85A	NEATM
0.057	0.0047	0.0047	Masiero	2011ApJ...741...68M	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
12.63			MPC-2023-12-04	MPC-2023-12-04	Phot

Periods

Value	Quality	Side real or Synodic	Author	Reference	Method
5.0	3-	Synodic	Chang	2019ApJS..241....6C	Lightcurve

Spectral Class Data

Class 1	Class 2	Probability of Class 1	Probability of Class 2	Taxonomy	Wavelength	Author	Reference	Method
X		0.899		Bus-Demeo	VIS	Sergeyev	2022A&A...658A.109S	PHOT