Asteroids

2026OC help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.731

Aphelion (Q)

2.386

Eccentricity (e)

0.531

Inclination (i)

7.2

deg

Orbit period (P)

710.7

Earth MOID

0.00280

U parameter

8.7

Next Earth close approach

Date

2030-02-13

Nominal distance (from Earth center)

0.12566

18798604

Maximum Brightness

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.3

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-07-16

Observatory

Palomar Mountain--ZTF

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

1.558561

1-sigma variation

0.005173

Unit

Eccentricity (e)

Value

0.530868

1-sigma variation

0.001981

Unit

Inclination (i)

Value

7.1746

1-sigma variation

0.0250

Unit

Long. of Ascending Node (Ω)

Value

293.1077

1-sigma variation

0.0008

Unit

Arg. of Perihelion (ω)

Value

279.6685

1-sigma variation

0.0056

Unit

Mean Anomaly (M)

Value

8.16821

1-sigma variation

0.07727

Unit

Perihelion distance

Value

0.731170

1-sigma variation

Unit

Aphelion distance

Value

2.385951

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.011180

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.245018

1-sigma variation

Unit

MOID

Value

0.002804

1-sigma variation

Unit

Orbit Period

Value

710.6963

1-sigma variation

Unit

U parameter

Value

8.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.67613E-5	1.02498E-5	1.29303E-4	3.92862E-6	2.86831E-5	-3.99710E-4
e	1.02498E-5	3.92578E-6	4.95242E-5	1.50469E-6	1.09854E-5	-1.53092E-4
i	1.29303E-4	4.95242E-5	6.24769E-4	1.89810E-5	1.38554E-4	-1.93127E-3
Ω	3.92862E-6	1.50469E-6	1.89810E-5	5.77109E-7	4.21386E-6	-5.86792E-5
ω	2.86831E-5	1.09854E-5	1.38554E-4	4.21386E-6	3.08616E-5	-4.28435E-4
M	-3.99710E-4	-1.53092E-4	-1.93127E-3	-5.86792E-5	-4.28435E-4	5.97010E-3

Date of computation: 2026-07-30 14:25 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

27.32

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

9 - 20*

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

[-]

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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

1.05835

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-07-16.325101

Unit

Source

[2]

Last Observation

Value

2026-07-22.200674

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

16 (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 2026OC 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	1954-07-23 11:32	> 1 w	0.1545948	0.0033256	0.4765101
EARTH	1956-06-24 01:04	> 1 mo	0.1724926	0.0111273	0.3273899
EARTH	1960-02-17 22:42	> 1 w	0.1503385	0.0423036	0.1894381
EARTH	1991-07-05 03:38	> 1 mo	0.1089766	0.0008214	1.2168390
EARTH	1997-01-27 19:29	> 1 mo	0.1480308	0.0465684	1.1341498
EARTH	2026-07-14 10:03	< 1 min	0.0047104	0.0046608	0.0000165
EARTH	2030-02-13 16:49	> 1 w	0.1256609	0.0455837	0.1111010
EARTH	2053-07-16 20:54	> 1 mo	0.0323679	0.0014404	0.6842374
EARTH	2082-07-09 19:34	> 1 mo	0.0679542	0.0005968	5.6189615
EARTH	2086-02-10 11:20	> 1 mo	0.0922976	0.0504183	4.2640157
EARTH	2109-07-24 03:10	> 1 mo	0.1332986	0.0026534	2.0589064
EARTH	2115-01-29 17:01	> 1 mo	0.1519327	0.0511203	3.3170115

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
49.15248441	187.62965338	0.00280408	MINIMUM
312.77804900	31.12589978	0.04970432	MINIMUM
1.03253002	109.07674691	0.29384380	SADDLE
180.42099861	289.06248895	1.40417989	SADDLE
1.77750176	290.45705126	1.72249108	SADDLE
180.68274659	109.21230297	3.38599854	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026OC

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2079-07-15.509	80594.509	3.512	1.21 ± 0.003	2.95E4	6.68E-8	1.12E-1	-8.14
2081-07-15.005	81325.005	3.727	0.54 ± 0.004	3.15E4	2.70E-8	1.13E-1	-8.55
2083-07-15.498	82055.498	-2.061	0.85 ± 0.000	1.03E8	8.73E-10	1.03E-1	-10.08
2088-07-14.748	83881.748	1.411	0.30 ± 0.002	1.25E6	2.89E-7	1.08E-1	-7.58
2089-07-15.000	84246.999	-1.171	0.16 ± 0.008	2.54E6	1.94E-7	1.04E-1	-7.77
2090-07-15.232	84612.232	1.129	0.53 ± 0.003	5.90E4	8.18E-6	1.08E-1	-6.14
2090-07-15.276	84612.276	1.381	0.51 ± 0.001	8.87E4	4.28E-6	1.08E-1	-6.42
2092-07-14.717	85342.717	0.995	0.33 ± 0.001	2.16E6	2.72E-7	1.08E-1	-7.64
2093-07-15.016	85708.016	-1.182	1.12 ± 0.000	1.12E7	1.87E-8	1.04E-1	-8.82
2096-07-14.662	86803.662	-0.041	0.46 ± 0.000	1.15E7	7.98E-8	1.06E-1	-8.20
2096-07-14.710	86803.710	-3.863	0.25 ± 0.004	8.09E4	6.91E-9	9.98E-2	-9.28
2098-07-15.176	87534.176	-0.045	0.07 ± 0.716	1.81E8	4.32E-9	1.06E-1	-9.48
2098-07-15.192	87534.192	-0.042	1.24 ± 0.000	7.56E6	1.31E-7	1.06E-1	-8.00
2098-07-15.213	87534.213	-4.268	0.74 ± 0.004	3.79E5	2.34E-10	9.93E-2	-10.77
2104-07-15.669	89725.669	-0.043	1.21 ± 0.000	1.51E7	1.43E-8	1.06E-1	-8.99


Based on 16 optical observations (of which 3 are rejected as outliers) from 2026/07/16.325 to 2026/07/22.201.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.24 and 1.24 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260723 125653.503 UTC.

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