Asteroids

2026JB4 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.033

Aphelion (Q)

1.316

Eccentricity (e)

0.120

Inclination (i)

12.3

deg

Orbit period (P)

465.2

Earth MOID

0.02437

U parameter

7.1

Next Earth close approach

Date

2026-05-17

Nominal distance (from Earth center)

0.02434

3641705

Maximum Brightness

19.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

11 - 24*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-05-14

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.174939

1-sigma variation

0.000211

Unit

Eccentricity (e)

Value

0.120432

1-sigma variation

0.000146

Unit

Inclination (i)

Value

12.3386

1-sigma variation

0.0089

Unit

Long. of Ascending Node (Ω)

Value

55.1556

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

191.1457

1-sigma variation

0.0089

Unit

Mean Anomaly (M)

Value

9.43809

1-sigma variation

0.00805

Unit

Perihelion distance

Value

1.033439

1-sigma variation

Unit

Aphelion distance

Value

1.316439

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.323902

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.024651

1-sigma variation

Unit

MOID

Value

0.024370

1-sigma variation

Unit

Orbit Period

Value

465.1805

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.46724E-8	3.08435E-8	1.88233E-6	-2.39182E-8	7.59894E-7	-1.05742E-6
e	3.08435E-8	2.13099E-8	1.29872E-6	-1.65739E-8	5.55510E-7	-7.53879E-7
i	1.88233E-6	1.29872E-6	7.94025E-5	-1.00523E-6	3.01680E-5	-4.31291E-5
Ω	-2.39182E-8	-1.65739E-8	-1.00523E-6	1.31854E-8	-5.37703E-7	6.67006E-7
ω	7.59894E-7	5.55510E-7	3.01680E-5	-5.37703E-7	7.98164E-5	-6.95831E-5
M	-1.05742E-6	-7.53879E-7	-4.31291E-5	6.67006E-7	-6.95831E-5	6.48286E-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

27.007

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

11 - 24*

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

0.8

Unit

Source

[1]

Normalized RMS of residuals

Value

0.76607

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-05-14.296169

Unit

Source

[2]

Last Observation

Value

2026-05-15.92424

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

34 (1)

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 2026JB4 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	1961-05-16 13:32	> 1 w	0.0252324	0.0238035	0.0700468
EARTH	1975-05-18 21:19	> 1 d	0.0323815	0.0236300	0.0700039
EARTH	2012-05-15 14:24	> 1 d	0.0313891	0.0236802	0.0150848
EARTH	2026-05-17 11:38	< 1 min	0.0243433	0.0242890	0.0000181
EARTH	2040-05-20 04:37	> 1 d	0.0591416	0.0216933	0.0213343
EARTH	2077-05-14 12:20	1148.1	0.0493932	0.0230519	0.0122948
EARTH	2091-05-16 16:51	188.1	0.0282576	0.0253570	0.0012051
EARTH	2105-05-10 09:51	72.8	0.1410664	0.1365519	0.0015052
EARTH	2124-05-31 04:08	24.3	0.1964586	0.1943032	0.0007185

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
350.92976364	130.94353771	0.02436962	MINIMUM
217.08964335	354.40747725	0.34769966	SADDLE
7.08362257	329.01160839	2.01909177	SADDLE
181.54544849	143.42806046	2.32924836	MAXIMUM

Download:

MOID Plots

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