Asteroids

2026HE1 help

Last update: 2026-05-30 14:45 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.979

Aphelion (Q)

1.713

Eccentricity (e)

0.272

Inclination (i)

3.2

deg

Orbit period (P)

570.4

Earth MOID

0.00187

U parameter

6.5

Next Earth close approach

Date

2051-03-06

Nominal distance (from Earth center)

0.03602

5388186

Maximum Brightness

24.8

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

28.2

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-04-18

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

1.345954

1-sigma variation

0.000124

Unit

Eccentricity (e)

Value

0.272472

1-sigma variation

0.000070

Unit

Inclination (i)

Value

3.1805

1-sigma variation

0.0007

Unit

Long. of Ascending Node (Ω)

Value

203.3098

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

331.1900

1-sigma variation

0.0007

Unit

Mean Anomaly (M)

Value

51.30388

1-sigma variation

0.00800

Unit

Perihelion distance

Value

0.979219

1-sigma variation

Unit

Aphelion distance

Value

1.712689

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.003486

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.639223

1-sigma variation

Unit

MOID

Value

0.001872

1-sigma variation

Unit

Orbit Period

Value

570.3532

1-sigma variation

Unit

U parameter

Value

6.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.54380E-8	8.66305E-9	8.51137E-8	-1.27674E-8	8.48718E-8	-9.94449E-7
e	8.66305E-9	4.86129E-9	4.77620E-8	-7.16284E-9	4.76199E-8	-5.58033E-7
i	8.51137E-8	4.77620E-8	4.69294E-7	-7.02778E-8	4.67632E-7	-5.48256E-6
Ω	-1.27674E-8	-7.16284E-9	-7.02778E-8	1.10224E-8	-7.13271E-8	8.22749E-7
ω	8.48718E-8	4.76199E-8	4.67632E-7	-7.13271E-8	4.70556E-7	-5.46849E-6
M	-9.94449E-7	-5.58033E-7	-5.48256E-6	8.22749E-7	-5.46849E-6	6.40586E-5

Date of computation: 2026-05-30 14:45 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

28.212

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

6 - 14*

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

0.530939

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-04-17.27687

Unit

Source

[2]

Last Observation

Value

2026-05-12.554566

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

78 (2)

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 2026HE1 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
MARS	1953-03-14 13:48	474.2	0.0309717	0.0295953	0.0455187
EARTH	1955-01-31 06:31	> 1 w	0.1476124	0.0484716	0.1936753
EARTH	1972-03-03 14:25	> 1 w	0.0381185	0.0352214	0.0129932
EARTH	1989-02-26 19:56	> 1 w	0.0408321	0.0374786	0.0050168
EARTH	2009-05-08 18:11	1169.0	0.1849354	0.1411454	0.0146051
EARTH	2026-04-16 06:12	< 1 min	0.0105691	0.0105614	0.0000026
EARTH	2051-03-06 01:53	> 1 w	0.0360178	0.0328212	0.0043990
EARTH	2065-04-29 20:12	> 1 d	0.0808517	0.0059620	0.0548607
EARTH	2090-03-16 11:56	> 1 mo	0.0301744	0.0232733	0.0219338
EARTH	2104-04-29 04:29	> 1 w	0.0698480	0.0061437	0.0767604

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
20.77635254	96.40630521	0.00187228	MINIMUM
181.51279841	251.80550115	0.70804080	SADDLE
3.19414995	253.41059063	1.98433342	SADDLE
181.95704841	72.13673693	2.70713640	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2026HE1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2106-04-13.038	90362.038	-1.410	2.16 ± 0.000	1.67E5	3.04E-6	1.27E-2	-7.42
2112-04-12.567	92553.567	-1.167	2.46 ± 0.000	1.91E4	1.39E-5	1.27E-2	-6.79
2112-04-12.614	92553.614	-1.117	1.11 ± 0.000	8.54E5	1.15E-6	1.27E-2	-7.87
2117-04-12.402	94379.402	1.111	2.49 ± 0.000	1.91E5	1.63E-6	1.27E-2	-7.74
2117-04-12.654	94379.654	-1.382	1.38 ± 0.000	1.01E5	6.50E-6	1.27E-2	-7.14
2117-04-12.783	94379.783	-1.283	1.68 ± 0.003	3.25E5	2.08E-6	1.27E-2	-7.64
2118-04-12.844	94744.844	-1.632	0.68 ± 0.004	1.74E6	2.97E-7	1.27E-2	-8.49
2118-04-12.932	94744.932	-1.613	1.39 ± 0.000	4.03E6	1.15E-7	1.27E-2	-8.90
2120-04-12.050	95475.050	-1.169	1.71 ± 0.063	9.98E6	7.70E-8	1.27E-2	-9.08
2121-04-12.423	95840.423	1.384	1.82 ± 0.001	6.35E4	9.56E-6	1.27E-2	-6.99
2123-04-13.141	96571.141	-1.186	1.96 ± 0.002	9.82E4	7.99E-6	1.27E-2	-7.08
2123-04-13.141	96571.141	-1.195	2.01 ± 0.001	1.94E3	5.05E-4	1.27E-2	-5.28
2124-04-12.279	96936.279	-1.596	1.87 ± 0.009	8.50E5	4.69E-7	1.27E-2	-8.31
2126-04-13.129	97667.129	-0.580	1.42 ± 0.001	1.40E5	1.05E-5	1.27E-2	-6.97


Based on 78 optical observations (of which 2 are rejected as outliers) from 2026/04/17.277 to 2026/05/12.555.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.54 and 2.55 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260530 150259.867 UTC.

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