Asteroids

2026HJ3 help

Last update: 2026-05-09 13:30 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.831

Aphelion (Q)

1.156

Eccentricity (e)

0.164

Inclination (i)

11.8

deg

Orbit period (P)

361.7

Earth MOID

0.04046

U parameter

6.4

Next Earth close approach

Date

2027-05-01

Nominal distance (from Earth center)

0.07723

11552937

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

19 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-04-23

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

0.993411

1-sigma variation

0.000049

Unit

Eccentricity (e)

Value

0.163743

1-sigma variation

0.000127

Unit

Inclination (i)

Value

11.8127

1-sigma variation

0.0124

Unit

Long. of Ascending Node (Ω)

Value

43.1109

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

58.3395

1-sigma variation

0.0122

Unit

Mean Anomaly (M)

Value

140.36301

1-sigma variation

0.03063

Unit

Perihelion distance

Value

0.830746

1-sigma variation

Unit

Aphelion distance

Value

1.156075

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.101661

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.049666

1-sigma variation

Unit

MOID

Value

0.040457

1-sigma variation

Unit

Orbit Period

Value

361.6527

1-sigma variation

Unit

U parameter

Value

6.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.35779E-9	6.14608E-9	6.03735E-7	-9.46380E-9	5.94526E-7	-1.48738E-6
e	6.14608E-9	1.60240E-8	1.57405E-6	-2.46701E-8	1.54963E-6	-3.87737E-6
i	6.03735E-7	1.57405E-6	1.54634E-4	-2.42236E-6	1.52211E-4	-3.80866E-4
Ω	-9.46380E-9	-2.46701E-8	-2.42236E-6	3.83039E-8	-2.38763E-6	5.97133E-6
ω	5.94526E-7	1.54963E-6	1.52211E-4	-2.38763E-6	1.49928E-4	-3.75053E-4
M	-1.48738E-6	-3.87737E-6	-3.80866E-4	5.97133E-6	-3.75053E-4	9.38322E-4

Date of computation: 2026-05-09 13:30 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

25.746

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

19 - 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

[-]

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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

0.632246

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-04-23.403317

Unit

Source

[2]

Last Observation

Value

2026-05-08.03033

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

48 (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 2026HJ3 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	1950-10-18 09:10	> 1 d	0.0948160	0.0915452	0.0065562
EARTH	1951-10-10 04:25	> 1 d	0.1262997	0.0976643	0.0165304
EARTH	1952-10-02 04:51	> 1 d	0.1770720	0.1230292	0.0212492
EARTH	2023-04-28 02:00	27.8	0.1843529	0.1805979	0.0012528
EARTH	2024-04-26 02:10	6.5	0.1186682	0.1162351	0.0008128
EARTH	2025-04-26 03:34	10.8	0.0620484	0.0611252	0.0003104
EARTH	2026-04-27 18:01	< 1 min	0.0415672	0.0414434	0.0000413
EARTH	2027-05-01 21:25	75.3	0.0772266	0.0763042	0.0003090
EARTH	2028-05-08 18:17	241.9	0.1266440	0.1247084	0.0006478
EARTH	2029-05-20 18:54	485.4	0.1735614	0.1710999	0.0008253
EARTH	2030-12-09 09:01	1244.9	0.1923071	0.1885673	0.0012702
EARTH	2031-11-23 19:27	1253.3	0.1575981	0.1528231	0.0016354
EARTH	2032-11-09 03:26	1215.4	0.1216138	0.1167103	0.0017250
EARTH	2033-10-28 10:18	1098.7	0.0945196	0.0921297	0.0009967
EARTH	2034-10-18 14:36	935.6	0.0936367	0.0914034	0.0010164
EARTH	2035-10-10 09:35	767.6	0.1251492	0.1166378	0.0030205
EARTH	2036-10-02 09:25	613.0	0.1764892	0.1638836	0.0043019
EARTH	2107-04-28 16:48	734.4	0.1680042	0.0852187	0.0286617
EARTH	2108-04-26 22:06	319.6	0.1033472	0.0426959	0.0263326
EARTH	2109-04-27 06:32	550.1	0.0509449	0.0398548	0.0166146
EARTH	2110-04-29 04:52	> 1 d	0.0456909	0.0399695	0.0118774
EARTH	2111-05-03 23:40	> 1 d	0.0874533	0.0473109	0.0205644
EARTH	2112-05-11 13:30	> 1 d	0.1367898	0.0847876	0.0199512
EARTH	2113-05-24 04:43	> 1 d	0.1823898	0.1371974	0.0168862
EARTH	2114-12-06 16:51	> 1 w	0.1853050	0.1559839	0.0130605
EARTH	2115-11-21 14:02	> 1 w	0.1496572	0.1210060	0.0139600
EARTH	2116-11-07 10:48	> 1 d	0.1143402	0.0979074	0.0118953
EARTH	2117-10-27 07:07	> 1 d	0.0908498	0.0892364	0.0042614
EARTH	2118-10-17 20:59	> 1 d	0.0968214	0.0908086	0.0079589
EARTH	2119-10-09 21:49	> 1 d	0.1342429	0.1005266	0.0159593
EARTH	2120-10-02 01:49	> 1 d	0.1891217	0.1371600	0.0193402

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
106.25626432	111.42689076	0.04045721	MINIMUM
296.61858940	286.18960994	0.08834974	MINIMUM
19.99452050	19.97372121	0.23466653	SADDLE
202.74532472	196.38295107	0.25131725	SADDLE
3.42754612	180.57035151	1.84027872	SADDLE
176.22673771	353.17280307	2.13177638	MAXIMUM

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MOID Plots

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