Asteroids

2026OB1 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.461

Aphelion (Q)

2.583

Eccentricity (e)

0.697

Inclination (i)

0.1

deg

Orbit period (P)

685.8

Earth MOID

0.00126

U parameter

8.4

Next Earth close approach

Date

2036-03-01

Nominal distance (from Earth center)

0.01286

1924013

Maximum Brightness

19.4

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

16 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-07-19

Observatory

Pan-STARRS 2, Haleakala

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

1.522016

1-sigma variation

0.002663

Unit

Eccentricity (e)

Value

0.697180

1-sigma variation

0.000762

Unit

Inclination (i)

Value

0.0991

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

77.7245

1-sigma variation

0.0420

Unit

Arg. of Perihelion (ω)

Value

334.1983

1-sigma variation

0.0421

Unit

Mean Anomaly (M)

Value

309.11999

1-sigma variation

0.15280

Unit

Perihelion distance

Value

0.460897

1-sigma variation

Unit

Aphelion distance

Value

2.583135

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.507869

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.144803

1-sigma variation

Unit

MOID

Value

0.001265

1-sigma variation

Unit

Orbit Period

Value

685.8468

1-sigma variation

Unit

U parameter

Value

8.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.09199E-6	2.02892E-6	5.45048E-7	1.09270E-4	-1.09772E-4	4.06932E-4
e	2.02892E-6	5.80444E-7	1.55926E-7	3.12582E-5	-3.14018E-5	1.16417E-4
i	5.45048E-7	1.55926E-7	4.21505E-8	8.53915E-6	-8.57835E-6	3.12743E-5
Ω	1.09270E-4	3.12582E-5	8.53915E-6	1.76025E-3	-1.76830E-3	6.26975E-3
ω	-1.09772E-4	-3.14018E-5	-8.57835E-6	-1.76830E-3	1.77640E-3	-6.29855E-3
M	4.06932E-4	1.16417E-4	3.12743E-5	6.26975E-3	-6.29855E-3	2.33494E-2

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

26.162

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

16 - 30*

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

0.662742

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-07-19.457779

Unit

Source

[2]

Last Observation

Value

2026-07-25.054606

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

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 2026OB1 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	1959-03-04 07:52	> 1 mo	0.0894177	0.0019863	3.3440172
VENUS	1962-09-22 23:00	> 1 mo	0.0428414	0.0393799	1.2193447
EARTH	1964-07-20 17:46	> 1 mo	0.0891210	0.0015819	2.6638606
EARTH	1991-02-27 09:10	> 1 w	0.0207927	0.0018706	0.2193737
EARTH	2006-03-05 13:59	> 1 w	0.1138263	0.0018314	0.3140688
EARTH	2011-07-19 22:34	> 1 w	0.1279593	0.0013456	0.2356300
EARTH	2026-07-25 17:10	< 1 s	0.0057995	0.0057775	0.0000073
VENUS	2034-02-01 15:32	> 1 w	0.0403376	0.0398353	0.0220130
EARTH	2036-03-01 02:37	> 1 w	0.0128612	0.0014730	0.1785325
VENUS	2043-08-06 02:20	> 1 mo	0.0458549	0.0353955	1.0863722
EARTH	2051-02-20 22:49	> 1 mo	0.1706075	0.0015483	3.2665580
EARTH	2069-07-28 02:36	> 1 mo	0.0380209	0.0010491	6.5554308
VENUS	2078-12-30 05:40	> 1 mo	0.0409702	0.0401433	0.2245357
EARTH	2084-07-22 03:56	> 1 mo	0.0836932	0.0009115	5.9548240
VENUS	2088-07-05 06:44	> 1 mo	0.0361250	0.0355853	1.7611844
EARTH	2094-03-06 20:31	> 1 mo	0.1162460	0.0013521	19.6333780
EARTH	2109-03-01 16:14	> 1 mo	0.0139425	0.0012213	41.4488834
MARS	2114-05-25 05:06	> 1 mo	0.0463795	0.0361242	104.8267066

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
298.48227709	198.54968207	0.00126451	MINIMUM
59.93694066	54.28900646	0.00167797	MINIMUM
358.27422549	305.11504670	0.52931617	SADDLE
358.23992534	125.06732374	1.47085237	SADDLE
179.69361946	127.09452631	1.57294296	SADDLE
179.69981016	307.10310521	3.57312003	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026OB1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2074-02-28.207	78631.207	1.790	0.69 ± 0.005	9.47E6	1.75E-8	9.14E-1	-7.95
2088-03-02.071	83747.071	-0.859	1.03 ± 0.005	1.12E7	2.19E-8	9.00E-1	-7.96
2101-03-03.355	88495.355	-1.682	0.84 ± 0.004	4.44E7	3.27E-9	8.96E-1	-8.88
2101-03-03.817	88495.817	0.599	1.10 ± 0.000	5.48E8	4.60E-10	9.09E-1	-9.72
2106-03-03.537	90321.537	-1.776	0.60 ± 0.005	2.62E8	5.96E-10	8.95E-1	-9.64
2113-03-01.263	92876.263	-1.751	0.84 ± 0.005	3.25E7	4.13E-9	8.95E-1	-8.84
2115-03-03.945	93608.945	4.077	0.61 ± 0.005	8.83E5	2.34E-10	9.27E-1	-10.08
2115-03-03.961	93608.961	4.126	0.61 ± 0.005	1.29E6	1.17E-10	9.27E-1	-10.38


Based on 36 optical observations (of which 0 are rejected as outliers) from 2026/07/19.458 to 2026/07/25.055.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.12 and 1.12 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260726 133044.915 UTC.

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