Asteroids

2026TK77 help

Last update: 2026-10-14 09:45 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.946

Aphelion (Q)

1.822

Eccentricity (e)

0.317

Inclination (i)

3.0

deg

Orbit period (P)

594.6

Earth MOID

0.02488

U parameter

8.4

Next Earth close approach

Date

2026-10-22

Nominal distance (from Earth center)

0.02476

3704672

Maximum Brightness

21.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

11 - 24*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-08

Observatory

Kitt Peak-Bok

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

1.383808

1-sigma variation

0.002328

Unit

Eccentricity (e)

Value

0.316572

1-sigma variation

0.001235

Unit

Inclination (i)

Value

2.9758

1-sigma variation

0.0123

Unit

Long. of Ascending Node (Ω)

Value

182.0180

1-sigma variation

0.0084

Unit

Arg. of Perihelion (ω)

Value

247.2744

1-sigma variation

0.0146

Unit

Mean Anomaly (M)

Value

18.32887

1-sigma variation

0.03179

Unit

Perihelion distance

Value

0.945733

1-sigma variation

Unit

Aphelion distance

Value

1.821882

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.423115

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.107310

1-sigma variation

Unit

MOID

Value

0.024877

1-sigma variation

Unit

Orbit Period

Value

594.5824

1-sigma variation

Unit

U parameter

Value

8.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.41850E-6	2.87469E-6	2.84910E-5	1.83225E-5	-3.15943E-5	-7.39908E-5
e	2.87469E-6	1.52523E-6	1.51065E-5	9.69066E-6	-1.67079E-5	-3.92618E-5
i	2.84910E-5	1.51065E-5	1.50586E-4	9.89418E-5	-1.70780E-4	-3.88437E-4
Ω	1.83225E-5	9.69066E-6	9.89418E-5	7.06652E-5	-1.22420E-4	-2.48139E-4
ω	-3.15943E-5	-1.67079E-5	-1.70780E-4	-1.22420E-4	2.12160E-4	4.27725E-4
M	-7.39908E-5	-3.92618E-5	-3.88437E-4	-2.48139E-4	4.27725E-4	1.01086E-3

Date of computation: 2026-10-14 09:45 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

27.007

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

11 - 24*

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

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.359509

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-08.336882

Unit

Source

[2]

Last Observation

Value

2026-10-14.099131

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

16 (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 2026TK77 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	1969-10-21 00:12	> 1 mo	0.0243076	0.0236276	0.1154061
EARTH	1982-11-25 06:41	> 1 mo	0.0601384	0.0277943	0.1387706
EARTH	1996-01-09 02:08	> 1 mo	0.0557618	0.0511298	0.1331709
EARTH	2026-10-22 13:47	1.7	0.0247642	0.0244680	0.0000987
EARTH	2039-12-07 10:57	> 1 mo	0.0612570	0.0604799	0.0072624
EARTH	2053-01-14 02:00	> 1 mo	0.0757445	0.0497964	0.2089909
MARS	2063-03-16 23:21	1033.9	0.0397204	0.0115218	0.1146284
EARTH	2070-10-03 02:15	> 1 d	0.1952925	0.0573368	0.0463548
EARTH	2083-10-25 07:05	> 1 mo	0.0262304	0.0252793	0.0370341
EARTH	2097-01-06 19:26	> 1 mo	0.0497815	0.0488708	0.3162602
EARTH	2114-10-05 02:32	> 1 mo	0.1851187	0.0202961	9.6311547

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
330.78393431	287.39179707	0.02487673	MINIMUM
24.62425561	0.05471436	0.05018490	MINIMUM
2.26644416	329.93349211	0.06143350	SADDLE
179.35648569	145.56081343	0.81225013	SADDLE
358.40506493	144.65795661	1.95733666	SADDLE
179.10333139	325.38437127	2.80714851	MAXIMUM

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MOID Plots

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