Asteroids

2026JA help

Last update: 2026-05-16 13:16 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.621

Aphelion (Q)

1.128

Eccentricity (e)

0.290

Inclination (i)

19.2

deg

Orbit period (P)

298.8

Earth MOID

0.00161

U parameter

4.4

Next Earth close approach

Date

2035-05-03

Nominal distance (from Earth center)

0.00214

320566

Maximum Brightness

15.2

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.7

mag

Diameter

12 - 27*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-05-04

Observatory

GINOP-KHK, Piszkesteto

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

0.874672

1-sigma variation

0.000002

Unit

Eccentricity (e)

Value

0.289941

1-sigma variation

0.000031

Unit

Inclination (i)

Value

19.2434

1-sigma variation

0.0035

Unit

Long. of Ascending Node (Ω)

Value

222.6914

1-sigma variation

2.624E-5

Unit

Arg. of Perihelion (ω)

Value

224.5442

1-sigma variation

0.0022

Unit

Mean Anomaly (M)

Value

152.27955

1-sigma variation

0.00651

Unit

Perihelion distance

Value

0.621068

1-sigma variation

Unit

Aphelion distance

Value

1.128275

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002001

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.328135

1-sigma variation

Unit

MOID

Value

0.001611

1-sigma variation

Unit

Orbit Period

Value

298.7900

1-sigma variation

Unit

U parameter

Value

4.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.44799E-12	4.59974E-11	5.18402E-9	3.97517E-11	3.25295E-9	-9.77326E-9
e	4.59974E-11	9.58209E-10	1.07709E-7	7.97878E-10	6.64772E-8	-2.01377E-7
i	5.18402E-9	1.07709E-7	1.21091E-5	8.97423E-8	7.47587E-6	-2.26419E-5
Ω	3.97517E-11	7.97878E-10	8.97423E-8	6.88654E-10	5.57357E-8	-1.68359E-7
ω	3.25295E-9	6.64772E-8	7.47587E-6	5.57357E-8	4.62789E-6	-1.39983E-5
M	-9.77326E-9	-2.01377E-7	-2.26419E-5	-1.68359E-7	-1.39983E-5	4.23688E-5

Date of computation: 2026-05-16 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

26.698

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

12 - 27*

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

0.430784

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-05-04.004304

Unit

Source

[2]

Last Observation

Value

2026-05-12.138276

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

68 (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 2026JA 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	1952-05-03 09:08	100.1	0.0460564	0.0212586	0.0082674
EARTH	1961-05-03 18:57	616.6	0.0569199	0.0005692	0.0305463
EARTH	1970-05-05 07:02	1044.0	0.1201411	0.0212107	0.0330094
EARTH	1993-05-06 02:41	970.2	0.1255364	0.0881527	0.0125080
EARTH	2002-05-03 08:37	< 1 min	0.0041548	0.0036927	0.0001554
EARTH	2007-05-11 08:09	21.5	0.1856680	0.1853134	0.0001182
EARTH	2026-05-03 08:30	< 1 s	0.0026959	0.0026946	0.0000004
EARTH	2035-05-03 12:56	< 1 min	0.0021429	0.0019623	0.0000712
EARTH	2054-05-03 07:03	379.6	0.0234778	0.0024832	0.0555110
EARTH	2068-05-03 22:57	> 1 d	0.0901664	0.0032984	0.1967327
EARTH	2087-05-04 13:29	> 1 w	0.0828517	0.0067912	0.3886350
EARTH	2101-05-04 07:21	> 1 d	0.0292898	0.0020826	0.3058429
EARTH	2120-05-04 01:53	> 1 w	0.0455305	0.0028846	1.3870659

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
122.01514428	117.29709223	0.00161059	MINIMUM
294.71342854	264.04848675	0.29180491	MINIMUM
227.03352146	198.36151406	0.34125405	SADDLE
21.55905362	10.40592852	0.42811866	SADDLE
5.54589879	169.00185935	1.62548360	SADDLE
174.02012544	336.43916469	2.09974109	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026JA

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2119-05-04.761	95131.761	0.321	0.000	0.29 ± 0.039	4.76E6	2.16E-7	1.82E-1	-7.70	0
2124-05-04.028	96958.028	1.126	0.000	1.14 ± 0.015	1.48E6	3.82E-7	1.82E-1	-7.48	0


Based on 68 optical observations (of which 0 are rejected as outliers) from 2026/05/04.004 to 2026/05/12.138.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.38 and 1.38 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260516 140442.830 UTC.

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Download Impactor Table as: