Asteroids

2026JN4 help

Last update: 2026-07-03 08:11 UTC

Orbital Properties

Epoch

61175.4

MJD

Orbit type

Apollo

Perihelion (q)

0.855

Aphelion (Q)

2.159

Eccentricity (e)

0.433

Inclination (i)

13.2

deg

Orbit period (P)

675.7

Earth MOID

0.00003

U parameter

9.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object impacted Earth on 2026-05-15 13:39:28

Physical Properties

Absolute Magnitude (H)

33.5

mag

Diameter

0.5 - 1.2*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-05-15

Observatory

JPL SynTrack Robotic Telescope, Auberry

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

61175.4185

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.506954

1-sigma variation

0.033248

Unit

Eccentricity (e)

Value

0.432865

1-sigma variation

0.014663

Unit

Inclination (i)

Value

13.1572

1-sigma variation

0.3519

Unit

Long. of Ascending Node (Ω)

Value

54.3909

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

240.7618

1-sigma variation

0.0969

Unit

Mean Anomaly (M)

Value

335.52500

1-sigma variation

1.04727

Unit

Perihelion distance

Value

0.854646

1-sigma variation

Unit

Aphelion distance

Value

2.159262

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.562193

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000050

1-sigma variation

Unit

MOID

Value

0.000029

1-sigma variation

Unit

Orbit Period

Value

675.6913

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.10542E-3	4.87500E-4	1.16987E-2	-1.66354E-5	-3.21958E-3	3.48193E-2
e	4.87500E-4	2.14992E-4	5.15927E-3	-7.33498E-6	-1.41985E-3	1.53556E-2
i	1.16987E-2	5.15927E-3	1.23814E-1	-1.75687E-4	-3.40677E-2	3.68494E-1
Ω	-1.66354E-5	-7.33498E-6	-1.75687E-4	2.76330E-7	4.88322E-5	-5.24105E-4
ω	-3.21958E-3	-1.41985E-3	-3.40677E-2	4.88322E-5	9.38308E-3	-1.01415E-1
M	3.48193E-2	1.53556E-2	3.68494E-1	-5.24105E-4	-1.01415E-1	1.09676E0

Date of computation: 2026-07-03 08:11 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

33.464

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

0.5 - 1.2*

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

0.1

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.745683

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-05-15.33914895

Unit

Source

[2]

Last Observation

Value

2026-05-15.4531069

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

6 (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 2026JN4 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	1975-05-07 14:58	> 1 mo	0.1148170	0.0056168	6.3229926
EARTH	1984-09-24 02:02	> 1 mo	0.1977036	0.1886860	1.7868320
EARTH	1995-05-28 04:38	> 1 mo	0.1114434	0.0140809	5.4372635
EARTH	2026-05-15 13:45	1.0	0.0000197	0.0000115	0.0000028

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
316.16831108	128.07009619	0.00001983	MINIMUM
50.72821066	261.19222980	0.16429449	MINIMUM
10.26498911	205.22669959	0.22971867	SADDLE
182.36415346	11.02895718	0.92706959	SADDLE
0.78776510	10.86889451	1.84790221	SADDLE
178.91613271	188.67495588	2.88685902	MAXIMUM

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MOID Plots

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