Asteroids

2026AJ help

Last update: 2026-01-16 13:16 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.905

Aphelion (Q)

2.226

Eccentricity (e)

0.422

Inclination (i)

3.0

deg

Orbit period (P)

715.3

Earth MOID

0.00144

U parameter

7.1

Next Earth close approach

Date

2057-04-03

Nominal distance (from Earth center)

0.06929

10366018

Maximum Brightness

26.2

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.2

mag

Diameter

9 - 21*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-01-08

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.565294

1-sigma variation

0.000446

Unit

Eccentricity (e)

Value

0.422130

1-sigma variation

0.000183

Unit

Inclination (i)

Value

2.9735

1-sigma variation

0.0011

Unit

Long. of Ascending Node (Ω)

Value

114.6430

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

41.5451

1-sigma variation

0.0012

Unit

Mean Anomaly (M)

Value

316.52164

1-sigma variation

0.01962

Unit

Perihelion distance

Value

0.904536

1-sigma variation

Unit

Aphelion distance

Value

2.226052

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.006275

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.862108

1-sigma variation

Unit

MOID

Value

0.001440

1-sigma variation

Unit

Orbit Period

Value

715.3066

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.98965E-7	8.15532E-8	4.69554E-7	1.26977E-7	5.33890E-7	8.75224E-6
e	8.15532E-8	3.34277E-8	1.92469E-7	5.20432E-8	2.18881E-7	3.58742E-6
i	4.69554E-7	1.92469E-7	1.10840E-6	2.99469E-7	1.26191E-6	2.06546E-5
Ω	1.26977E-7	5.20432E-8	2.99469E-7	8.11994E-8	3.39371E-7	5.58593E-6
ω	5.33890E-7	2.18881E-7	1.26191E-6	3.39371E-7	1.45273E-6	2.34792E-5
M	8.75224E-6	3.58742E-6	2.06546E-5	5.58593E-6	2.34792E-5	3.85002E-4

Date of computation: 2026-01-16 13:16 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

27.244

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 - 21*

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

0.551374

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-01-08.410839

Unit

Source

[2]

Last Observation

Value

2026-01-12.619143

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (2)

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

Close Approaches for 2026AJ 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	1977-04-12 18:44	> 1 mo	0.0522869	0.0520867	0.0184455
EARTH	1979-01-16 12:24	> 1 w	0.0159198	0.0019638	0.0937327
EARTH	2022-04-30 20:06	919.2	0.1692797	0.1401647	0.0098186
EARTH	2024-03-23 22:03	> 1 d	0.0798126	0.0743812	0.0018921
EARTH	2026-01-12 01:06	< 1 s	0.0103274	0.0103150	0.0000041
EARTH	2057-04-03 01:32	> 1 w	0.0692925	0.0541069	0.0350211
EARTH	2059-01-04 16:09	> 1 w	0.0835791	0.0023394	0.0874699
EARTH	2088-04-19 08:43	> 1 w	0.0588440	0.0524529	0.0311708
EARTH	2090-01-13 18:15	> 1 w	0.0040229	0.0001718	0.0830834
EARTH	2107-05-01 18:15	> 1 mo	0.1199689	0.0535083	42.1757258
EARTH	2108-12-30 13:31	> 1 mo	0.1706261	0.0043945	51.1315890
EARTH	2126-04-14 01:17	> 1 mo	0.0589753	0.0532255	17.7957113

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
331.69464727	11.51325515	0.00144038	MINIMUM
31.63486618	101.84304548	0.05208616	MINIMUM
3.97055475	60.12585028	0.09353577	SADDLE
180.93406183	235.80861104	1.21734792	SADDLE
2.08391619	237.17971143	1.91464514	SADDLE
180.73098514	55.67140871	3.21732136	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026AJ

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2088-01-14.737	83699.737	0.848	0.89 ± 0.006	2.23E7	4.00E-8	6.66E-2	-8.61
2090-01-14.410	84430.410	4.604	1.57 ± 0.000	1.42E5	5.46E-11	6.67E-2	-11.49
2094-01-14.375	85891.375	-3.117	1.17 ± 0.008	3.50E6	2.01E-9	6.60E-2	-9.95
2096-01-14.814	86621.814	0.870	1.21 ± 0.000	1.67E7	5.26E-8	6.66E-2	-8.54
2096-01-14.953	86621.953	-3.348	0.23 ± 0.000	1.33E5	3.54E-8	6.60E-2	-8.72
2096-01-15.001	86622.001	1.328	1.38 ± 0.000	2.24E4	1.24E-5	6.64E-2	-6.17
2098-01-14.362	87352.362	1.113	1.02 ± 0.000	6.75E4	8.29E-6	6.65E-2	-6.36
2100-01-14.895	88082.895	1.036	1.37 ± 0.000	1.35E5	5.32E-6	6.64E-2	-6.56
2102-01-15.392	88813.392	-0.044	1.17 ± 0.000	1.88E7	4.74E-8	6.63E-2	-8.62
2102-01-15.494	88813.494	1.000	1.30 ± 0.000	2.16E5	2.16E-6	6.64E-2	-6.97
2103-01-15.570	89178.570	0.796	0.84 ± 0.003	1.35E6	5.93E-7	6.64E-2	-7.53
2104-01-15.877	89543.877	4.906	0.59 ± 0.000	1.35E5	5.26E-11	6.69E-2	-11.59
2106-01-15.551	90274.551	0.965	1.58 ± 0.000	4.04E5	4.54E-7	6.64E-2	-7.67
2107-01-15.680	90639.680	0.776	0.93 ± 0.001	6.68E5	1.17E-6	6.65E-2	-7.26
2107-01-15.740	90639.740	-0.008	0.50 ± 0.000	1.29E6	9.47E-7	6.64E-2	-7.35
2107-01-15.743	90639.743	0.787	0.51 ± 0.000	7.73E6	1.16E-7	6.65E-2	-8.26
2107-01-15.787	90639.787	0.766	0.57 ± 0.000	5.37E6	1.67E-7	6.65E-2	-8.10
2108-01-15.845	91004.845	0.873	0.46 ± 0.032	7.19E6	1.19E-7	6.65E-2	-8.26
2108-01-15.960	91004.960	0.829	0.71 ± 0.000	2.12E6	3.87E-7	6.64E-2	-7.75
2109-01-15.121	91370.121	3.617	1.46 ± 0.045	2.06E7	4.07E-11	6.67E-2	-11.73
2109-01-15.161	91370.161	0.004	1.31 ± 0.001	9.30E5	8.21E-7	6.64E-2	-7.42
2109-01-15.187	91370.187	0.645	0.87 ± 0.000	1.40E7	6.30E-8	6.65E-2	-8.54
2110-01-15.437	91735.437	-3.577	1.28 ± 0.006	3.54E6	3.73E-10	6.61E-2	-10.77
2110-01-15.540	91735.540	0.946	1.44 ± 0.000	6.03E5	6.20E-7	6.64E-2	-7.55
2111-01-15.609	92100.609	0.743	1.43 ± 0.000	2.41E5	1.86E-6	6.65E-2	-7.08
2111-01-15.663	92100.663	0.019	1.38 ± 0.001	6.58E5	1.02E-6	6.63E-2	-7.34
2111-01-15.725	92100.725	-0.069	0.24 ± 0.000	2.08E7	6.12E-8	6.63E-2	-8.56
2111-01-15.734	92100.734	0.727	0.83 ± 0.000	2.84E6	2.99E-7	6.65E-2	-7.87
2113-01-15.260	92831.260	0.041	1.23 ± 0.001	4.15E5	2.00E-6	6.63E-2	-7.06
2113-01-15.287	92831.287	-3.810	1.26 ± 0.000	4.18E4	1.36E-8	6.60E-2	-9.23
2116-01-16.024	93927.024	-3.457	0.90 ± 0.032	2.85E7	9.75E-11	6.59E-2	-11.39
2117-01-15.075	94292.075	4.622	0.61 ± 0.000	1.32E5	2.07E-10	6.70E-2	-11.06
2117-01-15.158	94292.158	0.124	1.18 ± 0.000	1.37E5	6.85E-6	6.65E-2	-6.54


Based on 27 optical observations (of which 2 are rejected as outliers) from 2026/01/08.411 to 2026/01/12.619.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.61 and 1.61 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260116 134633.725 UTC.

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