Asteroids

2026HF2 help

Last update: 2026-04-28 07:51 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.918

Aphelion (Q)

1.534

Eccentricity (e)

0.251

Inclination (i)

31.5

deg

Orbit period (P)

496.0

Earth MOID

0.00029

U parameter

6.5

Next Earth close approach

Date

2045-04-23

Nominal distance (from Earth center)

0.06464

9669532

Maximum Brightness

24.9

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.8

mag

Diameter

7 - 17*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-04-20

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

1.226249

1-sigma variation

0.000106

Unit

Eccentricity (e)

Value

0.251306

1-sigma variation

0.000065

Unit

Inclination (i)

Value

31.4799

1-sigma variation

0.0039

Unit

Long. of Ascending Node (Ω)

Value

30.7426

1-sigma variation

5.632E-6

Unit

Arg. of Perihelion (ω)

Value

235.0631

1-sigma variation

0.0058

Unit

Mean Anomaly (M)

Value

1.46097

1-sigma variation

0.00435

Unit

Perihelion distance

Value

0.918085

1-sigma variation

Unit

Aphelion distance

Value

1.534413

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.346665

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.000313

1-sigma variation

Unit

MOID

Value

0.000294

1-sigma variation

Unit

Orbit Period

Value

495.9826

1-sigma variation

Unit

U parameter

Value

6.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.11579E-8	6.91256E-9	4.16213E-7	-5.60400E-10	-6.16448E-7	4.59075E-7
e	6.91256E-9	4.28384E-9	2.57999E-7	-3.45292E-10	-3.81450E-7	2.84194E-7
i	4.16213E-7	2.57999E-7	1.55453E-5	-2.07131E-8	-2.29465E-5	1.71017E-5
Ω	-5.60400E-10	-3.45292E-10	-2.07131E-8	3.17235E-11	3.15764E-8	-2.33465E-8
ω	-6.16448E-7	-3.81450E-7	-2.29465E-5	3.15764E-8	3.42045E-5	-2.54319E-5
M	4.59075E-7	2.84194E-7	1.71017E-5	-2.33465E-8	-2.54319E-5	1.89203E-5

Date of computation: 2026-04-28 07:51 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

27.753

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

7 - 17*

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

0.7

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

1.02382

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-04-20.404946

Unit

Source

[2]

Last Observation

Value

2026-04-21.112234

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

64 (4)

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 2026HF2 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	1959-04-23 02:10	532.0	0.0421127	0.0166955	0.0084790
EARTH	1980-04-27 12:29	913.4	0.1589362	0.1124267	0.0155088
EARTH	1984-04-11 23:42	928.0	0.1974741	0.1490938	0.0161314
EARTH	2005-04-17 20:14	1059.4	0.0699197	0.0184464	0.0171712
EARTH	2026-04-21 05:04	< 1 s	0.0007827	0.0007824	0.0000001
EARTH	2045-04-23 21:14	959.8	0.0646368	0.0198536	0.0149366
EARTH	2064-04-29 11:42	851.3	0.1910360	0.1482310	0.0142746
EARTH	2079-04-15 08:41	700.1	0.1395998	0.1052374	0.0114562
EARTH	2098-04-20 11:57	300.3	0.0196881	0.0056677	0.0046737
EARTH	2117-04-17 00:05	> 1 d	0.1166506	0.0029690	0.0542554

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
316.09206464	105.40376419	0.00029418	MINIMUM
95.01937233	273.72778941	0.29926526	MINIMUM
28.76757139	198.75562265	0.53804204	SADDLE
206.28610313	359.49029168	0.82235687	SADDLE
12.33369194	354.17632044	1.84555969	SADDLE
167.85934909	147.79323799	2.49792201	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026HF2

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2098-04-21.373	87449.373	0.190	1.12 ± 0.001	5.99E2	4.88E-4	7.02E-2	-4.57
2105-04-22.131	90006.131	0.241	0.82 ± 0.000	6.77E5	9.74E-7	7.01E-2	-7.31
2111-04-22.646	92197.646	0.157	0.56 ± 0.000	2.49E6	3.40E-7	7.01E-2	-7.80
2111-04-22.648	92197.648	-3.879	0.69 ± 0.002	1.45E5	3.06E-9	6.99E-2	-9.85
2116-04-21.906	94023.906	1.910	0.02 ± 0.000	1.16E8	1.31E-9	7.03E-2	-10.24
2116-04-21.908	94023.908	0.270	0.28 ± 0.000	9.00E5	9.78E-7	7.02E-2	-7.37
2117-04-22.174	94389.174	-3.707	0.07 ± 0.000	2.06E7	4.72E-11	6.99E-2	-11.69
2121-04-22.176	95850.176	-1.914	0.62 ± 0.000	2.25E7	5.69E-9	7.00E-2	-9.63
2121-04-22.177	95850.177	-1.750	0.87 ± 0.001	6.87E4	2.00E-6	7.00E-2	-7.08
2121-04-22.178	95850.178	2.033	1.12 ± 0.001	1.23E5	3.12E-7	7.03E-2	-7.89
2121-04-22.178	95850.178	-0.211	0.77 ± 0.001	3.34E4	2.08E-5	7.01E-2	-6.07
2122-04-22.428	96215.428	2.787	1.04 ± 0.016	2.92E6	3.06E-9	7.03E-2	-9.90
2122-04-22.431	96215.431	-4.036	0.48 ± 0.001	1.07E5	2.33E-9	6.99E-2	-10.02
2123-04-22.676	96580.676	0.259	0.31 ± 0.000	1.60E6	5.49E-7	7.02E-2	-7.65
2123-04-22.678	96580.678	0.143	0.09 ± 0.000	1.45E7	6.42E-8	7.02E-2	-8.58
2124-04-21.931	96945.931	-2.001	1.02 ± 0.004	3.84E5	1.69E-7	7.00E-2	-8.17
2124-04-21.932	96945.932	0.398	0.95 ± 0.000	1.40E5	3.76E-6	7.02E-2	-6.82


Based on 62 optical observations (of which 0 are rejected as outliers) from 2026/04/20.405 to 2026/04/21.112.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.18 and 1.18 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260421 090315.662 UTC.

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