Asteroids

2026HB3 help

Last update: 2026-06-05 00:55 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.661

Aphelion (Q)

2.353

Eccentricity (e)

0.561

Inclination (i)

21.6

deg

Orbit period (P)

675.8

Earth MOID

0.00044

U parameter

7.8

Next Earth close approach

Date

2040-10-27

Nominal distance (from Earth center)

0.04468

6684609

Maximum Brightness

23.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.5

mag

Diameter

5 - 12*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-04-22

Observatory

University of Arizona 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

1.507098

1-sigma variation

0.001147

Unit

Eccentricity (e)

Value

0.561423

1-sigma variation

0.000404

Unit

Inclination (i)

Value

21.6020

1-sigma variation

0.0141

Unit

Long. of Ascending Node (Ω)

Value

211.3644

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

272.6997

1-sigma variation

0.0084

Unit

Mean Anomaly (M)

Value

53.37359

1-sigma variation

0.07064

Unit

Perihelion distance

Value

0.660979

1-sigma variation

Unit

Aphelion distance

Value

2.353217

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000782

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.064948

1-sigma variation

Unit

MOID

Value

0.000445

1-sigma variation

Unit

Orbit Period

Value

675.7884

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.31497E-6	4.63728E-7	1.61533E-5	1.62705E-7	9.50920E-6	-8.10065E-5
e	4.63728E-7	1.63603E-7	5.70001E-6	5.83870E-8	3.34155E-6	-2.85675E-5
i	1.61533E-5	5.70001E-6	1.98615E-4	2.05073E-6	1.16200E-4	-9.95112E-4
Ω	1.62705E-7	5.83870E-8	2.05073E-6	3.53384E-8	1.00004E-6	-1.00277E-5
ω	9.50920E-6	3.34155E-6	1.16200E-4	1.00004E-6	7.08501E-5	-5.85748E-4
M	-8.10065E-5	-2.85675E-5	-9.95112E-4	-1.00277E-5	-5.85748E-4	4.99027E-3

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

28.516

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

5 - 12*

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

0.8

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.637538

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-04-22.403274

Unit

Source

[2]

Last Observation

Value

2026-04-23.162938

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

36 (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 2026HB3 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	1952-10-26 09:43	> 1 mo	0.0305740	0.0013920	223.8250569
EARTH	1959-10-25 06:27	> 1 mo	0.0073095	0.0010728	7.0271890
EARTH	1965-04-25 23:35	> 1 mo	0.0884938	0.0011825	7.5827915
EARTH	1972-04-12 01:34	> 1 mo	0.1731792	0.0073621	6.4516973
EARTH	1999-10-26 03:06	> 1 d	0.0085281	0.0014267	0.0703102
EARTH	2006-10-22 11:06	> 1 d	0.0615402	0.0009597	0.0993116
EARTH	2012-04-29 16:04	> 1 d	0.1719584	0.0033219	0.0803300
EARTH	2013-10-17 17:13	> 1 d	0.1549471	0.0015583	0.0739541
EARTH	2019-04-25 21:39	> 1 d	0.0780072	0.0000139	0.0495290
EARTH	2026-04-21 20:10	< 1 min	0.0006150	0.0006142	0.0000003
EARTH	2040-10-27 19:43	> 1 d	0.0446839	0.0365560	0.0601345
EARTH	2063-04-22 17:35	> 1 w	0.0113379	0.0022851	0.2945543
EARTH	2076-04-20 06:09	> 1 mo	0.0218876	0.0031208	6.6628426
EARTH	2090-10-31 00:45	> 1 mo	0.0506828	0.0394894	23.4598822
EARTH	2103-10-25 20:32	> 1 mo	0.1175818	0.0392418	85.1445619

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
53.60253627	105.99994745	0.00044462	MINIMUM
305.69629313	292.09047234	0.03531348	MINIMUM
359.53282209	18.42783163	0.44256021	SADDLE
179.78629279	199.88806994	1.45725871	SADDLE
0.35389950	200.03615424	1.64853035	SADDLE
180.40005220	20.23555295	3.28873399	MAXIMUM

Download:

MOID Plots

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