Asteroids

2026HA4 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.969

Aphelion (Q)

2.940

Eccentricity (e)

0.504

Inclination (i)

0.6

deg

Orbit period (P)

998.0

Earth MOID

0.00812

U parameter

8.0

Next Earth close approach

Date

2056-07-03

Nominal distance (from Earth center)

0.02228

3333438

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

16 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-04-22

Observatory

Pan-STARRS 2, Haleakala

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

1.954412

1-sigma variation

0.002996

Unit

Eccentricity (e)

Value

0.504065

1-sigma variation

0.000785

Unit

Inclination (i)

Value

0.6159

1-sigma variation

0.0010

Unit

Long. of Ascending Node (Ω)

Value

0.0327

1-sigma variation

0.0187

Unit

Arg. of Perihelion (ω)

Value

256.1323

1-sigma variation

0.0154

Unit

Mean Anomaly (M)

Value

3.14905

1-sigma variation

0.00554

Unit

Perihelion distance

Value

0.969262

1-sigma variation

Unit

Aphelion distance

Value

2.939562

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.650787

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.306988

1-sigma variation

Unit

MOID

Value

0.008122

1-sigma variation

Unit

Orbit Period

Value

997.9817

1-sigma variation

Unit

U parameter

Value

8.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.97722E-6	2.35284E-6	2.97199E-6	5.51230E-5	-4.49294E-5	-1.65918E-5
e	2.35284E-6	6.16657E-7	7.78890E-7	1.44450E-5	-1.17732E-5	-4.34859E-6
i	2.97199E-6	7.78890E-7	9.87150E-7	1.84283E-5	-1.50673E-5	-5.49000E-6
Ω	5.51230E-5	1.44450E-5	1.84283E-5	3.48404E-4	-2.86565E-4	-1.01720E-4
ω	-4.49294E-5	-1.17732E-5	-1.50673E-5	-2.86565E-4	2.36361E-4	8.28675E-5
M	-1.65918E-5	-4.34859E-6	-5.49000E-6	-1.01720E-4	8.28675E-5	3.06680E-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

26.157

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 - 30*

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

0.474483

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-04-22.347076

Unit

Source

[2]

Last Observation

Value

2026-05-03.964537

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

39 (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 2026HA4 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	1952-07-28 15:16	> 1 mo	0.1595538	0.0143028	0.4910743
EARTH	1963-06-26 09:47	> 1 mo	0.0327985	0.0136504	0.1138285
15 Eunomia	1973-08-25 08:38	> 1 d	0.0177972	0.0078073	0.2174709
EARTH	1974-04-16 03:41	> 1 mo	0.1710776	0.0064978	0.4849696
MARS	1977-05-07 05:05	> 1 w	0.0365461	0.0340130	0.1619887
EARTH	2004-07-20 24:00	> 1 mo	0.0692228	0.0117047	0.7844372
MARS	2007-06-09 12:27	> 1 mo	0.0373421	0.0340192	0.2155229
EARTH	2015-05-13 04:25	> 1 mo	0.0170785	0.0078939	0.0876096
EARTH	2026-05-07 04:19	< 1 min	0.0104813	0.0104397	0.0000139
EARTH	2056-07-03 02:52	> 1 mo	0.0222827	0.0103987	0.2026290
EARTH	2086-05-10 02:10	> 1 mo	0.0091886	0.0085702	0.8758161
EARTH	2116-07-09 21:14	> 1 mo	0.0105883	0.0084343	140.1783646

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
343.56978738	122.73338712	0.00812187	MINIMUM
17.90253866	182.48083223	0.01050456	MINIMUM
0.83881623	152.76589978	0.04681948	SADDLE
180.25832414	332.06116408	1.95420360	SADDLE
0.76551674	332.64986917	1.95463497	SADDLE
180.26398090	152.06885680	3.95437366	MAXIMUM

Download:

MOID Plots

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