Asteroids

2026HE4 help

Last update: 2026-04-26 13:01 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.019

Aphelion (Q)

1.124

Eccentricity (e)

0.049

Inclination (i)

30.4

deg

Orbit period (P)

405.2

Earth MOID

0.01425

U parameter

7.1

Next Earth close approach

Date

2036-04-20

Nominal distance (from Earth center)

0.08898

13311766

Maximum Brightness

23.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.1

mag

Diameter

16 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-04-24

Observatory

Catalina Sky 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

1.071651

1-sigma variation

0.000179

Unit

Eccentricity (e)

Value

0.048680

1-sigma variation

0.000152

Unit

Inclination (i)

Value

30.3820

1-sigma variation

0.0129

Unit

Long. of Ascending Node (Ω)

Value

213.0317

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

358.0809

1-sigma variation

0.0166

Unit

Mean Anomaly (M)

Value

42.84854

1-sigma variation

0.02548

Unit

Perihelion distance

Value

1.019483

1-sigma variation

Unit

Aphelion distance

Value

1.123818

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.014258

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.129188

1-sigma variation

Unit

MOID

Value

0.014252

1-sigma variation

Unit

Orbit Period

Value

405.2082

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.19236E-8	2.72171E-8	2.29733E-6	-1.29913E-8	2.77219E-6	-4.44698E-6
e	2.72171E-8	2.32046E-8	1.95868E-6	-1.10735E-8	2.36190E-6	-3.78992E-6
i	2.29733E-6	1.95868E-6	1.65407E-4	-9.32873E-7	1.98224E-4	-3.18868E-4
Ω	-1.29913E-8	-1.10735E-8	-9.32873E-7	5.38360E-9	-1.18353E-6	1.85980E-6
ω	2.77219E-6	2.36190E-6	1.98224E-4	-1.18353E-6	2.77075E-4	-4.19050E-4
M	-4.44698E-6	-3.78992E-6	-3.18868E-4	1.85980E-6	-4.19050E-4	6.49218E-4

Date of computation: 2026-04-26 13:01 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

26.066

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

16 - 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

0.709056

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-04-24.285343

Unit

Source

[2]

Last Observation

Value

2026-04-25.483441

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

74 (3)

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 2026HE4 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	1955-04-29 09:12	> 1 w	0.1821581	0.0119846	0.7741923
EARTH	1965-04-25 13:24	> 1 w	0.0774099	0.0135564	0.5075528
EARTH	1975-04-23 12:59	> 1 d	0.0146388	0.0139702	0.0164139
EARTH	1985-04-19 05:39	> 1 d	0.1293150	0.0131033	0.0508901
EARTH	1985-10-24 11:07	795.8	0.1858337	0.1374228	0.0322652
EARTH	1995-10-26 10:38	676.9	0.1293204	0.1286234	0.0038039
EARTH	2005-10-27 11:55	495.8	0.1658264	0.1341373	0.0159419
EARTH	2016-04-27 00:26	657.4	0.1258378	0.0808828	0.0150317
EARTH	2026-04-23 16:31	< 1 s	0.0143131	0.0142935	0.0000065
EARTH	2036-04-20 09:41	655.1	0.0889837	0.0447066	0.0149427
EARTH	2046-04-17 12:48	988.5	0.1987448	0.1225368	0.0254352
EARTH	2046-10-25 16:01	445.8	0.1465400	0.1305552	0.0111457
EARTH	2056-10-26 10:53	621.3	0.1324841	0.1293845	0.0071383
EARTH	2066-10-28 07:30	781.0	0.1872110	0.1379593	0.0288241
EARTH	2077-04-27 01:49	> 1 d	0.1141461	0.0132943	0.0516640
EARTH	2087-04-24 09:52	> 1 d	0.0183717	0.0141401	0.0306984
EARTH	2097-04-23 04:34	> 1 d	0.0187904	0.0142153	0.0650537
EARTH	2107-04-21 16:43	> 1 d	0.1112204	0.0136046	0.2317071
EARTH	2107-10-26 04:37	> 1 d	0.1930297	0.1372134	0.1532586
EARTH	2117-10-26 21:54	> 1 d	0.1361075	0.1293093	0.0926785

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
1.87042310	107.77100576	0.01425165	MINIMUM
181.69926845	289.16841949	0.12913744	MINIMUM
272.66995839	15.97847159	0.54390067	SADDLE
90.84295802	200.98281428	0.54962119	SADDLE
70.67986555	357.28350317	1.97466174	SADDLE
298.20102010	224.95777595	1.99955548	SADDLE
353.23785511	279.90922094	2.01529866	MAXIMUM
185.59718043	112.36581628	2.12962338	MAXIMUM

Download:

MOID Plots

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