1998 QR40

1998QR40, 44247, J98Q40R

All data for this body: [vot]

MPC data

Name (number)	1998 QR40 (44247)
a	2.70367
e	0.13301
i / sin(i)	4.0531 / 0.07068
q	2.34405
Q	3.06329
ω	113.3580
Node	245.3147
m	348.5500
n	0.2217
Epoch	2460800.5

n_obs	1936
n_opp	22
Years observed	1998-2025
rms	0.78

Best values

	Value	Standard error
Parent	Nemesis (128)

a_p	2.705
e_p	0.091
sin(i_p)	0.086
G	0.150
H	14.650
Mass
D	6.95	0.162
pV	0.067	0.0067

	Value
Rotational Period
Period quality	None
Spectral Class	C
Spectral Class Score	6.004

Family data

Parent	Parent name	Family ID	Family name	C_j	Author	Reference	Method
128	Nemesis	504	Nemesis	-2.4300	Nesvorny	doi.org/10.26033/6cg5-pt13	HCM-2020-08-14

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.7047	0.0906	0.0862	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
5.71	1.840	1.840	Masiero	2021PSJ.....2..162M	NEATM
6.31	2.390	2.390	Masiero	2020PSJ.....1....5M	NEATM
6.63	2.135	2.135	Masiero	2017AJ....154..168M	NEATM
6.76	0.318	0.318	Masiero	2011ApJ...741...68M	NEATM
7.04	0.191	0.191	Masiero	2011ApJ...741...68M	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.062	0.0168	0.0168	Masiero	2011ApJ...741...68M	NEATM
0.064	0.0443	0.0443	Masiero	2017AJ....154..168M	NEATM
0.067	0.0075	0.0075	Masiero	2011ApJ...741...68M	NEATM
0.070	0.0830	0.0830	Masiero	2020PSJ.....1....5M	NEATM
0.083	0.0360	0.0620	Masiero	2021PSJ.....2..162M	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
14.65			MPC-2023-12-04	MPC-2023-12-04	Phot

Spectral Class Data

Class 1	Class 2	Probability of Class 1	Probability of Class 2	Taxonomy	Wavelength	Author	Reference	Method
C		0.834		Bus-Demeo	VIS	Sergeyev	2022A&A...658A.109S	PHOT
C	Kl	None	None	Movis	NIR	Popescu	2018A&A...617A..12P	PHOT