Asteroids

2026TU3 help

Last update: 2026-10-07 02:00 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.745

Aphelion (Q)

2.448

Eccentricity (e)

0.534

Inclination (i)

3.7

deg

Orbit period (P)

736.7

Earth MOID

0.00144

U parameter

8.6

Next Earth close approach

Date

2028-10-16

Nominal distance (from Earth center)

0.09859

14748638

Maximum Brightness

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

29.2

mag

Diameter

4 - 9*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-06

Observatory

University of Arizona Catalina Sky Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.596381

1-sigma variation

0.004631

Unit

Eccentricity (e)

Value

0.533537

1-sigma variation

0.001719

Unit

Inclination (i)

Value

3.7476

1-sigma variation

0.0152

Unit

Long. of Ascending Node (Ω)

Value

14.9943

1-sigma variation

0.0034

Unit

Arg. of Perihelion (ω)

Value

73.0743

1-sigma variation

0.0138

Unit

Mean Anomaly (M)

Value

15.33510

1-sigma variation

0.04180

Unit

Perihelion distance

Value

0.744653

1-sigma variation

Unit

Aphelion distance

Value

2.448108

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.009534

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.351799

1-sigma variation

Unit

MOID

Value

0.001442

1-sigma variation

Unit

Orbit Period

Value

736.7213

1-sigma variation

Unit

U parameter

Value

8.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.14429E-5	7.95723E-6	6.92338E-5	-1.32064E-5	4.99094E-5	-1.93519E-4
e	7.95723E-6	2.95381E-6	2.57820E-5	-4.96079E-6	1.87885E-5	-7.18348E-5
i	6.92338E-5	2.57820E-5	2.32009E-4	-4.82869E-5	1.86031E-4	-6.26873E-4
Ω	-1.32064E-5	-4.96079E-6	-4.82869E-5	1.18996E-5	-4.73219E-5	1.20551E-4
ω	4.99094E-5	1.87885E-5	1.86031E-4	-4.73219E-5	1.89931E-4	-4.56519E-4
M	-1.93519E-4	-7.18348E-5	-6.26873E-4	1.20551E-4	-4.56519E-4	1.74698E-3

Date of computation: 2026-10-07 02:00 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

29.175

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

4 - 9*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

0.3

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.681598

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-06.337152

Unit

Source

[2]

Last Observation

Value

2026-10-06.61939

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

14 (0)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2026TU3 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1952-10-04 18:44	> 1 w	0.0138364	0.0040872	0.1027232
EARTH	1959-03-06 03:49	> 1 mo	0.0837943	0.0356434	0.4754472
EARTH	1989-09-26 05:12	> 1 mo	0.1582128	0.0038666	0.8765185
EARTH	1991-11-02 12:14	> 1 mo	0.1679975	0.0192019	0.5652489
EARTH	1996-03-02 13:20	> 1 mo	0.0433307	0.0349769	0.4034583
EARTH	2026-10-07 02:50	< 1 min	0.0021213	0.0021093	0.0000040
EARTH	2028-10-16 23:52	> 1 w	0.0985886	0.0041117	0.0509558
EARTH	2030-11-08 01:00	> 1 w	0.1858659	0.0258579	0.0632103
MARS	2031-04-07 08:45	> 1 d	0.0446298	0.0443936	0.0061778
EARTH	2039-02-02 09:28	> 1 mo	0.1809089	0.0296009	0.1903379
EARTH	2041-02-22 15:23	> 1 mo	0.0916465	0.0345406	0.2998076
EARTH	2043-03-04 11:04	> 1 w	0.0385499	0.0352259	0.1434873
EARTH	2045-03-11 11:45	> 1 w	0.1410377	0.0343733	0.4633481
EARTH	2123-10-04 02:08	> 1 mo	0.0773845	0.0003825	1.2263655
EARTH	2125-10-13 20:02	> 1 mo	0.0554516	0.0000625	1.0682757

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
314.58749044	271.64722128	0.00144184	MINIMUM
45.04763547	58.27449728	0.03557265	MINIMUM
359.96009897	345.31122495	0.24509804	SADDLE
179.92199583	164.93770023	1.43706718	SADDLE
359.54236973	164.57736524	1.75823526	SADDLE
179.81773475	344.88271797	3.43056754	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2026TU3

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2081-10-07.532	81409.532	-1.858	0.000	0.79 ± 0.055	2.71E6	5.32E-8	7.20E-3	-9.21	0
2085-10-07.523	82870.523	2.005	0.000	0.41 ± 0.035	6.95E4	1.86E-6	7.54E-3	-7.68	0


Based on 14 optical observations (of which 0 are rejected as outliers) from 2026/10/06.337 to 2026/10/06.619.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.28 and 1.28 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20261007 021845.352 UTC.

Download this part as:

Download Impactor Table as: