Asteroids

2026JU help

Last update: 2026-05-18 13:46 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.979

Aphelion (Q)

2.694

Eccentricity (e)

0.467

Inclination (i)

2.1

deg

Orbit period (P)

908.9

Earth MOID

0.00948

U parameter

7.1

Next Earth close approach

Date

2031-04-28

Nominal distance (from Earth center)

0.15859

23725168

Maximum Brightness

24.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.9

mag

Diameter

17 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-05-08

Observatory

Mt. Lemmon Survey

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

1.836346

1-sigma variation

0.000638

Unit

Eccentricity (e)

Value

0.466834

1-sigma variation

0.000191

Unit

Inclination (i)

Value

2.1145

1-sigma variation

0.0007

Unit

Long. of Ascending Node (Ω)

Value

223.4346

1-sigma variation

4.951E-5

Unit

Arg. of Perihelion (ω)

Value

41.1816

1-sigma variation

0.0008

Unit

Mean Anomaly (M)

Value

359.74252

1-sigma variation

0.00062

Unit

Perihelion distance

Value

0.979077

1-sigma variation

Unit

Aphelion distance

Value

2.693615

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.054253

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.224015

1-sigma variation

Unit

MOID

Value

0.009482

1-sigma variation

Unit

Orbit Period

Value

908.9296

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.07355E-7	1.21757E-7	4.41771E-7	-1.26731E-8	4.83504E-7	3.94416E-7
e	1.21757E-7	3.63929E-8	1.32044E-7	-3.78997E-9	1.44525E-7	1.17888E-7
i	4.41771E-7	1.32044E-7	4.79208E-7	-1.32784E-8	5.23596E-7	4.27826E-7
Ω	-1.26731E-8	-3.78997E-9	-1.32784E-8	2.45120E-9	-1.82395E-8	-1.19299E-8
ω	4.83504E-7	1.44525E-7	5.23596E-7	-1.82395E-8	5.81328E-7	4.66875E-7
M	3.94416E-7	1.17888E-7	4.27826E-7	-1.19299E-8	4.66875E-7	3.82167E-7

Date of computation: 2026-05-18 13:46 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

25.926

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

17 - 40*

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

[-]

Download this part as:

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

0.531874

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-05-08.20668

Unit

Source

[2]

Last Observation

Value

2026-05-16.435316

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

112 (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 2026JU 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	2016-04-28 04:36	454.0	0.1461496	0.1342167	0.0039779
EARTH	2021-05-11 17:35	> 1 d	0.0323027	0.0086478	0.0131071
EARTH	2026-05-16 15:48	< 1 s	0.0133910	0.0133769	0.0000047
EARTH	2031-04-28 02:57	> 1 d	0.1585930	0.1110731	0.0158429
EARTH	2098-08-06 05:42	> 1 w	0.1552910	0.0373258	0.1409407
EARTH	2103-07-19 16:29	> 1 w	0.0371323	0.0349462	0.0315319
EARTH	2108-06-18 02:28	> 1 mo	0.0452527	0.0379827	0.0172266
EARTH	2113-05-19 06:22	> 1 mo	0.0120130	0.0106370	0.0884906

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
343.70196224	132.78476843	0.00948230	MINIMUM
16.14127600	186.78033044	0.03481399	MINIMUM
2.61003702	164.25294325	0.04474043	SADDLE
180.26306084	340.46986903	1.70960823	SADDLE
0.63121140	340.92751125	1.96337193	SADDLE
180.20833496	160.44077861	3.70925521	MAXIMUM

Download:

MOID Plots

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