Asteroids

2026BX4 help

Last update: 2026-03-18 10:55 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Atira

Perihelion (q)

0.767

Aphelion (Q)

0.982

Eccentricity (e)

0.123

Inclination (i)

20.0

deg

Orbit period (P)

298.5

Earth MOID

0.01333

U parameter

4.7

Next Earth close approach

Date

2035-02-16

Nominal distance (from Earth center)

0.06443

9638217

Maximum Brightness

18.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

170 - 400*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-01-20

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

0.874058

1-sigma variation

0.000003

Unit

Eccentricity (e)

Value

0.122928

1-sigma variation

0.000005

Unit

Inclination (i)

Value

19.9796

1-sigma variation

0.0042

Unit

Long. of Ascending Node (Ω)

Value

328.0663

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

341.5608

1-sigma variation

0.0044

Unit

Mean Anomaly (M)

Value

339.29184

1-sigma variation

0.00635

Unit

Perihelion distance

Value

0.766612

1-sigma variation

Unit

Aphelion distance

Value

0.981504

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.241157

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.013491

1-sigma variation

Unit

MOID

Value

0.013328

1-sigma variation

Unit

Orbit Period

Value

298.4754

1-sigma variation

Unit

U parameter

Value

4.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.36813E-12	-1.23883E-11	-1.14222E-8	-4.99396E-10	1.19366E-8	-1.71713E-8
e	-1.23883E-11	2.08433E-11	1.92466E-8	8.41026E-10	-2.01199E-8	2.89351E-8
i	-1.14222E-8	1.92466E-8	1.78489E-5	7.79179E-7	-1.86669E-5	2.68262E-5
Ω	-4.99396E-10	8.41026E-10	7.79179E-7	3.41999E-8	-8.14623E-7	1.17075E-6
ω	1.19366E-8	-2.01199E-8	-1.86669E-5	-8.14623E-7	1.95287E-5	-2.80615E-5
M	-1.71713E-8	2.89351E-8	2.68262E-5	1.17075E-6	-2.80615E-5	4.03278E-5

Date of computation: 2026-03-18 10:55 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

20.985

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

170 - 400*

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

0.44066

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-01-20.53303

Unit

Source

[2]

Last Observation

Value

2026-02-22.386262

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

84 (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 2026BX4 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	1958-02-17 07:38	1.4	0.0958439	0.0944296	0.0004715
EARTH	1967-02-17 18:59	< 1 min	0.1372797	0.1358484	0.0004771
EARTH	1976-02-18 04:37	2.4	0.1945730	0.1933730	0.0004000
EARTH	1999-02-14 14:45	2.0	0.1647076	0.1646311	0.0000255
EARTH	2008-02-16 04:22	2.2	0.0869988	0.0865456	0.0001511
EARTH	2017-02-16 07:08	4.2	0.0252209	0.0245419	0.0002278
EARTH	2026-02-16 15:36	< 1 min	0.0196605	0.0196486	0.0000040
VENUS	2029-10-07 10:26	2.8	0.0472574	0.0469770	0.0000940
VENUS	2032-03-23 03:48	5.9	0.0491314	0.0486821	0.0001512
EARTH	2035-02-16 09:29	5.5	0.0644275	0.0635675	0.0002867
EARTH	2044-02-14 21:46	9.7	0.1778795	0.1767178	0.0003872
EARTH	2057-02-17 05:29	3.1	0.1741321	0.1729601	0.0003907
EARTH	2066-02-17 04:38	1.2	0.0554956	0.0545201	0.0003253
EARTH	2075-02-17 00:52	< 1 min	0.0147455	0.0146961	0.0000165
VENUS	2077-02-18 14:23	< 1 min	0.0388497	0.0388265	0.0000078
EARTH	2084-02-15 15:14	1.9	0.1456068	0.1451023	0.0001682
EARTH	2097-02-17 04:27	2.7	0.1492520	0.1480954	0.0003855
EARTH	2106-02-17 19:07	6.0	0.0168363	0.0160003	0.0002912
VENUS	2112-03-15 23:31	45.0	0.0402885	0.0386826	0.0005916

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
200.41668787	42.66912812	0.01332804	MINIMUM
22.92463437	231.59776199	0.23866751	MINIMUM
98.10674861	310.90068797	0.33993421	SADDLE
302.75072043	141.56344745	0.36934597	SADDLE
343.27128671	8.20831666	1.74542120	SADDLE
183.44744355	208.67655440	1.99398806	MAXIMUM

Download:

MOID Plots

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