Asteroids

2026TB5 help

Last update: 2026-10-08 14:46 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.870

Aphelion (Q)

2.938

Eccentricity (e)

0.543

Inclination (i)

1.9

deg

Orbit period (P)

959.5

Earth MOID

0.00289

U parameter

7.1

Next Earth close approach

Date

2026-10-08

Nominal distance (from Earth center)

0.00355

531261

Maximum Brightness

17.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.2

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

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

1.903853

1-sigma variation

0.000712

Unit

Eccentricity (e)

Value

0.543091

1-sigma variation

0.000197

Unit

Inclination (i)

Value

1.8712

1-sigma variation

0.0024

Unit

Long. of Ascending Node (Ω)

Value

10.7567

1-sigma variation

0.0051

Unit

Arg. of Perihelion (ω)

Value

55.5993

1-sigma variation

0.0152

Unit

Mean Anomaly (M)

Value

15.34297

1-sigma variation

0.00824

Unit

Perihelion distance

Value

0.869888

1-sigma variation

Unit

Aphelion distance

Value

2.937818

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.028203

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.936207

1-sigma variation

Unit

MOID

Value

0.002892

1-sigma variation

Unit

Orbit Period

Value

959.5076

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.07099E-7	1.38779E-7	-1.85181E-7	-1.14818E-6	3.46732E-6	-5.71640E-6
e	1.38779E-7	3.86887E-8	-1.13619E-7	-4.42346E-7	1.33164E-6	-1.61382E-6
i	-1.85181E-7	-1.13619E-7	5.75837E-6	1.19962E-5	-3.54551E-5	6.47379E-6
Ω	-1.14818E-6	-4.42346E-7	1.19962E-5	2.61554E-5	-7.74374E-5	2.18723E-5
ω	3.46732E-6	1.33164E-6	-3.54551E-5	-7.74374E-5	2.30814E-4	-6.57641E-5
M	-5.71640E-6	-1.61382E-6	6.47379E-6	2.18723E-5	-6.57641E-5	6.78828E-5

Date of computation: 2026-10-08 14:46 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

28.19

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

6 - 14*

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

0.2

Unit

Source

[1]

Unobserved

Value

0.3

Unit

Source

[1]

Normalized RMS of residuals

Value

0.707737

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-08.25585

Unit

Source

[2]

Last Observation

Value

2026-10-08.426156

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

17 (1)

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 2026TB5 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	1951-09-25 05:27	> 1 d	0.1412549	0.1023055	0.0130202
EARTH	1959-10-27 07:34	> 1 mo	0.0838073	0.0040386	0.3554653
EARTH	1968-01-01 17:26	> 1 mo	0.0682822	0.0355067	0.5968431
EARTH	1976-01-29 05:13	> 1 mo	0.1874186	0.0348109	0.9817490
MARS	2008-06-24 23:16	> 1 w	0.0308751	0.0269830	0.0890670
EARTH	2018-10-05 23:51	> 1 d	0.0212772	0.0022452	0.0260580
EARTH	2026-10-08 21:30	< 1 s	0.0035513	0.0035478	0.0000012
EARTH	2047-10-23 15:07	> 1 w	0.0698132	0.0005208	0.0467135
EARTH	2068-11-30 19:40	> 1 d	0.1182789	0.1170727	0.0004119
EARTH	2090-01-03 18:52	> 1 w	0.0701058	0.0309632	0.0333767
EARTH	2111-01-13 10:39	> 1 w	0.0386598	0.0301999	0.0268431
7 Iris	2112-02-20 00:39	> 1 d	0.0146395	0.0138022	0.0044580

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
331.12423466	273.66082553	0.00289167	MINIMUM
27.16187980	11.10640750	0.03128558	MINIMUM
359.41430184	322.93233944	0.11915709	SADDLE
359.02396058	142.24087748	1.88143543	SADDLE
179.73265147	143.05410915	1.92659713	SADDLE
179.70534272	323.04390982	3.92395992	MAXIMUM

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MOID Plots

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