Asteroids

2026AO4 help

Last update: 2026-01-20 13:01 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.500

Aphelion (Q)

1.084

Eccentricity (e)

0.369

Inclination (i)

24.8

deg

Orbit period (P)

257.5

Earth MOID

0.03823

U parameter

5.9

Next Earth close approach

Date

2038-01-17

Nominal distance (from Earth center)

0.1211

18116966

Maximum Brightness

23.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.3

mag

Diameter

23 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-01-14

Observatory

Kitt Peak-Bok

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

0.792149

1-sigma variation

0.000013

Unit

Eccentricity (e)

Value

0.368635

1-sigma variation

0.000310

Unit

Inclination (i)

Value

24.8223

1-sigma variation

0.0460

Unit

Long. of Ascending Node (Ω)

Value

113.3938

1-sigma variation

0.0042

Unit

Arg. of Perihelion (ω)

Value

155.1358

1-sigma variation

0.0184

Unit

Mean Anomaly (M)

Value

156.89622

1-sigma variation

0.05790

Unit

Perihelion distance

Value

0.500135

1-sigma variation

Unit

Aphelion distance

Value

1.084163

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.044613

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.504831

1-sigma variation

Unit

MOID

Value

0.038235

1-sigma variation

Unit

Orbit Period

Value

257.5188

1-sigma variation

Unit

U parameter

Value

5.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.66532E-10	-3.67646E-9	-5.35370E-7	-4.85500E-8	2.12092E-7	-6.72402E-7
e	-3.67646E-9	9.61677E-8	1.42524E-5	1.29338E-6	-5.69536E-6	1.79360E-5
i	-5.35370E-7	1.42524E-5	2.11585E-3	1.92023E-4	-8.46113E-4	2.66298E-3
Ω	-4.85500E-8	1.29338E-6	1.92023E-4	1.74271E-5	-7.67906E-5	2.41678E-4
ω	2.12092E-7	-5.69536E-6	-8.46113E-4	-7.67906E-5	3.38526E-4	-1.06512E-3
M	-6.72402E-7	1.79360E-5	2.66298E-3	2.41678E-4	-1.06512E-3	3.35200E-3

Date of computation: 2026-01-20 13:01 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

25.296

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

23 - 50*

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

0.511707

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-01-14.349311

Unit

Source

[2]

Last Observation

Value

2026-01-17.04068

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

33 (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

Note: Ephemerides requests are limited to a maximum of 100 points and a final date not exceeding 2080/07/22 14:12.

Close Approaches for 2026AO4 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	1952-01-17 10:13	62.0	0.1339121	0.1151172	0.0063399
EARTH	1959-01-11 11:52	460.9	0.1199729	0.1055454	0.0048958
EARTH	1971-01-15 12:06	231.3	0.0518793	0.0434832	0.0032842
EARTH	1983-01-17 02:03	83.2	0.0480653	0.0420718	0.0024102
EARTH	1990-01-04 10:37	321.5	0.1981914	0.1899574	0.0027617
EARTH	1995-01-17 09:30	20.1	0.1250153	0.1152520	0.0032785
EARTH	2002-01-10 21:38	199.8	0.1262554	0.1194787	0.0022735
EARTH	2014-01-15 01:15	65.1	0.0585789	0.0553869	0.0010891
EARTH	2026-01-16 21:36	< 1 min	0.0454771	0.0452688	0.0000694
EARTH	2038-01-17 08:06	22.4	0.1211044	0.1165741	0.0015139
EARTH	2045-01-10 10:05	242.1	0.1309214	0.1256029	0.0017867
EARTH	2057-01-14 19:09	188.4	0.0610829	0.0547432	0.0022395
EARTH	2069-01-16 19:32	86.5	0.0466479	0.0413559	0.0021855
EARTH	2076-01-04 22:55	591.2	0.1994322	0.1890188	0.0035195
EARTH	2081-01-17 06:02	51.3	0.1221270	0.1063312	0.0053283
EARTH	2088-01-11 11:26	536.6	0.1281759	0.1148682	0.0045212
EARTH	2100-01-15 23:59	303.5	0.0546050	0.0453314	0.0036952
EARTH	2112-01-18 19:47	110.5	0.0523686	0.0429230	0.0039311
EARTH	2119-01-06 14:50	694.8	0.1916578	0.1788752	0.0043314
EARTH	2124-01-19 01:33	72.0	0.1346528	0.1174988	0.0057757

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
219.81177298	14.36325338	0.03823494	MINIMUM
335.36416836	132.51223285	0.55666520	SADDLE
353.39528164	339.35723840	1.47707318	SADDLE
184.61502828	172.32968009	2.09484183	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out