Asteroids

2026BB4 help

Last update: 2026-01-25 12:45 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.813

Aphelion (Q)

1.882

Eccentricity (e)

0.397

Inclination (i)

10.1

deg

Orbit period (P)

571.3

Earth MOID

0.00180

U parameter

7.4

Next Earth close approach

Date

2037-02-09

Nominal distance (from Earth center)

0.12666

18948525

Maximum Brightness

25.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 29*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-01-19

Observatory

Pan-STARRS 1, 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.347437

1-sigma variation

0.000474

Unit

Eccentricity (e)

Value

0.396591

1-sigma variation

0.000274

Unit

Inclination (i)

Value

10.0575

1-sigma variation

0.0060

Unit

Long. of Ascending Node (Ω)

Value

304.6406

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

248.0315

1-sigma variation

0.0003

Unit

Mean Anomaly (M)

Value

287.70932

1-sigma variation

0.04371

Unit

Perihelion distance

Value

0.813056

1-sigma variation

Unit

Aphelion distance

Value

1.881818

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.316757

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.003816

1-sigma variation

Unit

MOID

Value

0.001800

1-sigma variation

Unit

Orbit Period

Value

571.2957

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.24277E-7	1.29839E-7	2.82622E-6	-1.64885E-7	-1.19875E-7	2.07000E-5
e	1.29839E-7	7.51675E-8	1.63621E-6	-9.54553E-8	-6.91963E-8	1.19836E-5
i	2.82622E-6	1.63621E-6	3.56179E-5	-2.07784E-6	-1.49838E-6	2.60847E-4
Ω	-1.64885E-7	-9.54553E-8	-2.07784E-6	1.21261E-7	8.81903E-8	-1.52184E-5
ω	-1.19875E-7	-6.91963E-8	-1.49838E-6	8.81903E-8	1.12235E-7	-1.10774E-5
M	2.07000E-5	1.19836E-5	2.60847E-4	-1.52184E-5	-1.10774E-5	1.91054E-3

Date of computation: 2026-01-25 12:45 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

26.56

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

13 - 29*

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

0.658135

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-01-19.32103

Unit

Source

[2]

Last Observation

Value

2026-01-24.771978

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

71 (1)

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

Close Approaches for 2026BB4 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	1957-01-16 16:03	> 1 mo	0.1276739	0.0038030	52.3320987
EARTH	1965-01-24 19:19	> 1 w	0.0023962	0.0003255	0.1164882
EARTH	1968-06-27 07:55	> 1 d	0.1452617	0.1066026	0.0800529
EARTH	1990-02-16 07:07	> 1 w	0.1539161	0.0330185	0.0856308
EARTH	2001-01-16 14:33	> 1 d	0.1385126	0.0027843	0.0827773
EARTH	2004-06-20 19:42	> 1 d	0.1115836	0.1063443	0.0201037
EARTH	2026-01-26 05:45	< 1 min	0.0090758	0.0090587	0.0000057
EARTH	2037-02-09 09:22	> 1 d	0.1266631	0.0322493	0.0321433
EARTH	2070-06-15 15:26	> 1 d	0.1503537	0.1029896	0.0631514
EARTH	2081-06-23 22:32	> 1 d	0.1090901	0.1061507	0.0239509
EARTH	2089-01-20 23:05	> 1 w	0.0706132	0.0024105	0.1292832
EARTH	2092-06-30 04:58	> 1 d	0.1856649	0.1043275	0.0783282
EARTH	2100-01-28 12:54	> 1 d	0.0265231	0.0036426	0.0176060

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
312.58531659	23.47051650	0.00179957	MINIMUM
56.58884448	170.24427170	0.10560136	MINIMUM
7.56786135	101.48876435	0.24339020	SADDLE
182.66568544	273.36278662	0.90986436	SADDLE
3.47495556	275.17695930	1.80666582	SADDLE
180.74114326	92.08392072	2.87432602	MAXIMUM

Download:

MOID Plots

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