Asteroids

2026KO1 help

Last update: 2026-06-05 00:55 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.717

Aphelion (Q)

1.034

Eccentricity (e)

0.181

Inclination (i)

0.5

deg

Orbit period (P)

299.1

Earth MOID

0.00347

U parameter

6.4

Next Earth close approach

Date

2035-04-04

Nominal distance (from Earth center)

0.03123

4672441

Maximum Brightness

24.8

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.8

mag

Diameter

7 - 16*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-05-22

Observatory

University of Arizona Mt. Lemmon 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.875347

1-sigma variation

0.000040

Unit

Eccentricity (e)

Value

0.181252

1-sigma variation

0.000063

Unit

Inclination (i)

Value

0.4869

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

99.3743

1-sigma variation

0.0010

Unit

Arg. of Perihelion (ω)

Value

311.7522

1-sigma variation

0.0012

Unit

Mean Anomaly (M)

Value

214.95610

1-sigma variation

0.00416

Unit

Perihelion distance

Value

0.716689

1-sigma variation

Unit

Aphelion distance

Value

1.034005

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.228642

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.053188

1-sigma variation

Unit

MOID

Value

0.003474

1-sigma variation

Unit

Orbit Period

Value

299.1360

1-sigma variation

Unit

U parameter

Value

6.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.57030E-9	-2.51233E-9	-6.80605E-9	3.72903E-9	2.76748E-8	-1.64461E-7
e	-2.51233E-9	4.01954E-9	1.08912E-8	-6.09870E-9	-4.41889E-8	2.63185E-7
i	-6.80605E-9	1.08912E-8	2.96602E-8	-2.86259E-8	-1.08830E-7	7.14756E-7
Ω	3.72903E-9	-6.09870E-9	-2.86259E-8	1.02211E-6	-8.67766E-7	-5.05948E-7
ω	2.76748E-8	-4.41889E-8	-1.08830E-7	-8.67766E-7	1.36914E-6	-2.82307E-6
M	-1.64461E-7	2.63185E-7	7.14756E-7	-5.05948E-7	-2.82307E-6	1.72822E-5

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

27.821

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

7 - 16*

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

0.72099

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-05-20.28052

Unit

Source

[2]

Last Observation

Value

2026-06-03.17937

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

36 (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

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 2026KO1 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
VENUS	1953-09-16 12:51	> 1 mo	0.0381161	0.0097179	1841.9139482
VENUS	1956-01-18 21:51	> 1 mo	0.0393546	0.0298879	971.1434342
EARTH	1961-04-23 21:30	> 1 mo	0.0129219	0.0037238	110.7836436
VENUS	1971-07-12 03:27	> 1 mo	0.0066857	0.0065924	0.4228307
EARTH	1978-05-25 04:33	> 1 mo	0.0167396	0.0045696	0.3150285
VENUS	1986-12-04 10:38	> 1 d	0.0327115	0.0071816	0.0640990
EARTH	1991-06-14 23:31	> 1 d	0.0799776	0.0059783	0.2831256
EARTH	1995-04-05 02:52	> 1 d	0.1148564	0.0075187	0.2761432
VENUS	2007-02-20 14:51	> 1 d	0.0255123	0.0254948	0.0002207
EARTH	2008-04-09 09:21	> 1 d	0.0122730	0.0070481	0.0122818
EARTH	2017-05-26 12:26	> 1 d	0.0177807	0.0130588	0.0015819
EARTH	2026-05-25 15:52	< 1 min	0.0182139	0.0181936	0.0000068
EARTH	2035-04-04 02:30	470.0	0.0312333	0.0214424	0.0033240
EARTH	2035-08-07 15:22	> 1 d	0.1696625	0.1630217	0.0022136
EARTH	2049-04-24 10:35	> 1 w	0.0212626	0.0090767	0.0082362
EARTH	2058-04-02 09:31	> 1 d	0.1438173	0.0093694	0.0686385
EARTH	2063-06-12 00:01	> 1 d	0.1845380	0.0033683	0.0930027
EARTH	2072-01-21 20:11	> 1 mo	0.1943129	0.0841529	0.0371783
EARTH	2072-06-12 11:09	880.0	0.0839122	0.0031853	0.0733338
EARTH	2081-01-21 18:09	> 1 mo	0.1942486	0.1317825	0.0209851
EARTH	2081-06-12 11:37	189.3	0.0854771	0.0002259	0.0490910
EARTH	2090-06-11 17:17	> 1 d	0.1624616	0.0002682	0.1218095
EARTH	2103-04-04 18:37	> 1 d	0.1286347	0.0085932	0.1423609
EARTH	2112-04-03 09:10	496.9	0.0873277	0.0085296	0.0602297
EARTH	2112-08-22 23:17	> 1 mo	0.1961518	0.1055748	0.0302249
EARTH	2121-04-04 14:38	> 1 d	0.1716704	0.0093574	0.0963183
EARTH	2126-06-15 07:49	> 1 d	0.1364719	0.0026057	0.1063863

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
208.79416886	150.38069507	0.00347357	MINIMUM
142.68978007	94.37226802	0.00831840	MINIMUM
175.26709501	121.99454819	0.02538199	SADDLE
353.77079559	300.38586570	0.27422185	SADDLE
353.69326473	120.31302356	1.72597838	SADDLE
175.80843381	302.46349587	2.02460714	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2026KO1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2081-06-01.294	81281.294	-4.767	0.48 ± 0.004	2.86E5	1.25E-10	1.98E-2	-11.48
2098-05-27.319	87485.319	-1.202	3.28 ± 0.008	5.80E5	1.48E-6	1.98E-2	-7.53
2100-06-04.826	88223.826	-1.561	1.36 ± 0.009	6.98E5	1.08E-6	2.01E-2	-7.68
2104-05-24.786	89673.786	-1.187	3.97 ± 0.008	3.08E6	2.89E-7	1.95E-2	-8.28
2109-06-05.830	91511.830	-4.077	1.22 ± 0.000	1.06E7	6.78E-11	1.98E-2	-11.93
2113-06-07.233	92974.233	2.572	3.08 ± 0.004	2.23E5	4.32E-7	1.99E-2	-8.15
2117-04-13.838	94380.838	3.897	2.03 ± 0.914	8.90E6	1.16E-10	2.02E-2	-11.73
2118-06-12.589	94805.589	-1.591	1.61 ± 0.007	1.43E6	4.62E-7	2.03E-2	-8.14


Based on 36 optical observations (of which 0 are rejected as outliers) from 2026/05/20.281 to 2026/06/03.179.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 3.34 and 3.34 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260603 133239.285 UTC.

Download this part as:

Download Impactor Table as: