Tvardovskij

03261, 1949 SN1, 1949SN1, 1953 KB, 1953KB, 1959 RL, 1959RL, 1967 EQ, 1967EQ, 1969 UW1, 1969UW1, 1975 XU5, 1975XU5, 1979 SF9, 1979SF9, J49S01N, J53K00B, J59R00L, J67E00Q, J69U01W, J75X05U, J79S09F

All data for this body: [vot]

MPC data

Name (number)	Tvardovskij (3261)
a	2.90870
e	0.07535
i / sin(i)	2.7527 / 0.04802
q	2.68952
Q	3.12788
ω	185.4624
Node	142.8113
m	115.4249
n	0.1987
Epoch	2460800.5

n_obs	5460
n_opp	36
Years observed	1949-2025
rms	0.66

Best values

	Value	Standard error
Parent	Koronis (158)

a_p	2.904
e_p	0.054
sin(i_p)	0.037
G	0.150
H	11.860
Mass
D	11.78	0.092
pV	0.270	0.0250

	Value
Rotational Period	5.369
Period quality	2
Spectral Class	None
Spectral Class Score

Family data

Parent	Parent name	Family ID	Family name	C_j	Author	Reference	Method
158	Koronis	0	Koronis		Novakovic	2019EPSC...13.1671N	HCM
158	Koronis	605	Koronis	0.6900	Nesvorny	doi.org/10.26033/6cg5-pt13	HCM-2020-08-14

Proper elements data

a_p	e_p	sin(i_p)	Author	Reference	Method
2.9037	0.0543	0.0374	Novakovic_Radovic_Todovic	2003A&A...403.1165K	Numeric-Nov-2024

Diameter data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
11.73	0.120	0.120	Masiero	2014ApJ...791..121M	NEATM
11.81	0.144	0.144	Masiero	2011ApJ...741...68M	NEATM
14.93	1.260	1.260	Usui	2011PASJ...63.1117U	NEATM
15.47	3.090	3.090	Ali-Lagoa	2018A&A...612A..85A	NEATM

Albedo data

Value	Uncertainty up	Uncertainty down	Author	Reference	Method
0.161	0.0640	0.0640	Ali-Lagoa	2018A&A...612A..85A	NEATM
0.290	0.0300	0.0300	Masiero	2014ApJ...791..121M	NEATM
0.290	0.0637	0.0637	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
11.86			MPC-2023-12-04	MPC-2023-12-04	Phot

Periods

Value	Quality	Side real or Synodic	Author	Reference	Method
5.36852	2	Sidereal	Durech	2016A&A...587A..48D	Model
5.36852	2	Sidereal	Durech	2023A&A...675A..24D	Model