Asteroids

2026OK4 help

Last update: 2026-08-05 14:30 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.898

Aphelion (Q)

1.893

Eccentricity (e)

0.357

Inclination (i)

15.8

deg

Orbit period (P)

602.0

Earth MOID

0.00113

U parameter

6.7

Next Earth close approach

Date

2060-07-22

Nominal distance (from Earth center)

0.06269

9378569

Maximum Brightness

23.9

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

2026-07-25

Observatory

ATLAS-MLO, Mauna Loa

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.395345

1-sigma variation

0.000187

Unit

Eccentricity (e)

Value

0.356679

1-sigma variation

0.000097

Unit

Inclination (i)

Value

15.7926

1-sigma variation

0.0031

Unit

Long. of Ascending Node (Ω)

Value

123.6086

1-sigma variation

2.030E-5

Unit

Arg. of Perihelion (ω)

Value

236.4704

1-sigma variation

0.0024

Unit

Mean Anomaly (M)

Value

304.11757

1-sigma variation

0.01371

Unit

Perihelion distance

Value

0.897655

1-sigma variation

Unit

Aphelion distance

Value

1.893036

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.532188

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.001518

1-sigma variation

Unit

MOID

Value

0.001132

1-sigma variation

Unit

Orbit Period

Value

602.0340

1-sigma variation

Unit

U parameter

Value

6.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.51544E-8	1.81937E-8	5.83842E-7	3.64483E-9	-4.27969E-7	2.57006E-6
e	1.81937E-8	9.42190E-9	3.02572E-7	1.87279E-9	-2.19735E-7	1.32952E-6
i	5.83842E-7	3.02572E-7	9.72670E-6	5.95711E-8	-6.98680E-6	4.26433E-5
Ω	3.64483E-9	1.87279E-9	5.95711E-8	4.11931E-10	-4.83457E-8	2.67784E-7
ω	-4.27969E-7	-2.19735E-7	-6.98680E-6	-4.83457E-8	5.72509E-6	-3.14590E-5
M	2.57006E-6	1.32952E-6	4.26433E-5	2.67784E-7	-3.14590E-5	1.87949E-4

Date of computation: 2026-08-05 14:30 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

26.983

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

0.592712

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-07-25.466894

Unit

Source

[2]

Last Observation

Value

2026-07-26.547359

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

44 (3)

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 2026OK4 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	1965-08-03 10:29	120.8	0.0796024	0.0771322	0.0008234
EARTH	1998-07-20 21:22	> 1 d	0.0831733	0.0027090	0.0326042
EARTH	2026-07-26 22:07	< 1 s	0.0030374	0.0030355	0.0000006
EARTH	2060-07-22 03:36	> 1 d	0.0626919	0.0003859	0.0387994
EARTH	2081-08-03 14:36	> 1 d	0.0820714	0.0043401	0.0265628
EARTH	2115-07-27 11:37	> 1 d	0.0151938	0.0034081	0.0710381

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
319.53175793	199.66823598	0.00113200	MINIMUM
50.64340587	326.21100813	0.24837983	MINIMUM
20.34401068	285.74022197	0.27177011	SADDLE
184.21808450	77.09899899	0.95202631	SADDLE
0.06273817	75.79786902	1.88109188	SADDLE
176.84092910	251.95136100	2.88115472	MAXIMUM

Download:

MOID Plots

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