Asteroids

2026CU1 help

Last update: 2026-02-12 14:05 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.964

Aphelion (Q)

2.902

Eccentricity (e)

0.501

Inclination (i)

0.9

deg

Orbit period (P)

981.7

Earth MOID

0.00039

U parameter

8.6

Next Earth close approach

Date

2026-02-26

Nominal distance (from Earth center)

0.00821

1227934

Maximum Brightness

15.2

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

24.4

mag

Diameter

30 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-02-10

Observatory

Purple Mountain Observatory, XuYi Station

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

1.933095

1-sigma variation

0.006014

Unit

Eccentricity (e)

Value

0.501362

1-sigma variation

0.001569

Unit

Inclination (i)

Value

0.8548

1-sigma variation

0.0019

Unit

Long. of Ascending Node (Ω)

Value

341.4793

1-sigma variation

0.0224

Unit

Arg. of Perihelion (ω)

Value

202.1517

1-sigma variation

0.0229

Unit

Mean Anomaly (M)

Value

316.64976

1-sigma variation

0.20364

Unit

Perihelion distance

Value

0.963915

1-sigma variation

Unit

Aphelion distance

Value

2.902275

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.693164

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.003838

1-sigma variation

Unit

MOID

Value

0.000387

1-sigma variation

Unit

Orbit Period

Value

981.6989

1-sigma variation

Unit

U parameter

Value

8.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.61702E-5	9.43751E-6	1.10413E-5	9.36134E-5	-4.59241E-5	1.22469E-3
e	9.43751E-6	2.46331E-6	2.88823E-6	2.39496E-5	-1.13445E-5	3.19535E-4
i	1.10413E-5	2.88823E-6	3.43464E-6	2.45334E-5	-8.62305E-6	3.73757E-4
Ω	9.36134E-5	2.39496E-5	2.45334E-5	5.01585E-4	-4.65829E-4	3.17559E-3
ω	-4.59241E-5	-1.13445E-5	-8.62305E-6	-4.65829E-4	5.22840E-4	-1.56291E-3
M	1.22469E-3	3.19535E-4	3.73757E-4	3.17559E-3	-1.56291E-3	4.14671E-2

Date of computation: 2026-02-12 14:05 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

24.426

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

30 - 80*

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

0.397886

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-02-06.287751

Unit

Source

[2]

Last Observation

Value

2026-02-12.417661

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

24 (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

Close Approaches for 2026CU1 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	1983-02-16 13:20	> 1 mo	0.0623118	0.0020061	0.3461186
EARTH	1991-05-03 17:57	> 1 mo	0.0546169	0.0121912	0.8020089
EARTH	2026-02-26 21:15	21.9	0.0082082	0.0081056	0.0000342
EARTH	2087-05-03 01:15	> 1 mo	0.0372560	0.0121927	0.9674256
EARTH	2095-04-23 03:37	> 1 mo	0.0125280	0.0118154	0.4228198
EARTH	2103-03-13 01:47	> 1 mo	0.0215777	0.0006417	13.9742069
EARTH	2111-03-03 11:28	> 1 mo	0.0018618	0.0014010	33.4472137

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
346.26886394	57.88105517	0.00038724	MINIMUM
16.96483227	110.41348649	0.01176054	MINIMUM
2.01577661	84.79686163	0.03535241	SADDLE
180.59074120	263.00278457	1.89938065	SADDLE
1.77423851	264.37517161	1.96661965	SADDLE
180.58214551	82.99639516	3.90076072	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026CU1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2039-03-02.250	65849.250	-4.554	0.35 ± 1.023	1.10E4	3.00E-9	2.88E0	-7.78
2045-03-01.789	68040.789	4.614	1.36 ± 0.011	8.69E3	2.22E-9	3.22E0	-8.02
2045-03-01.951	68040.951	1.041	0.78 ± 0.062	2.13E6	3.39E-7	3.08E0	-5.86
2053-03-01.737	70962.737	1.054	1.52 ± 0.008	1.10E6	3.53E-7	3.09E0	-5.99
2053-03-01.742	70962.742	3.453	0.82 ± 0.009	1.27E4	2.42E-7	3.19E0	-6.14
2061-03-01.493	73884.493	1.066	0.21 ± 0.257	1.75E6	4.31E-7	3.10E0	-6.01
2061-03-01.652	73884.652	3.437	1.00 ± 0.010	5.48E5	5.42E-9	3.18E0	-7.90
2063-03-02.222	74615.222	0.973	1.69 ± 0.009	5.44E5	2.30E-7	3.08E0	-6.31
2069-03-01.362	76806.362	1.079	0.52 ± 0.008	5.06E5	1.43E-6	3.10E0	-5.57
2069-03-01.457	76806.457	2.419	0.73 ± 0.012	8.92E3	7.34E-6	3.15E0	-4.86
2070-03-01.521	77171.521	-4.619	0.69 ± 0.362	2.72E5	1.10E-10	2.90E0	-9.72
2071-03-01.713	77536.713	0.958	0.72 ± 0.445	3.39E5	2.43E-6	3.11E0	-5.36
2071-03-01.778	77536.778	-0.963	1.64 ± 0.104	4.45E5	1.81E-6	3.03E0	-5.50
2071-03-01.870	77536.870	-0.674	0.75 ± 0.012	5.08E3	1.91E-4	3.05E0	-3.47
2076-02-29.796	79362.796	-0.989	1.53 ± 0.008	2.14E6	1.68E-7	3.04E0	-6.57
2076-02-29.818	79362.818	-1.572	1.52 ± 0.007	1.57E5	1.14E-6	3.01E0	-5.74
2076-02-29.834	79362.834	-2.447	1.02 ± 0.008	3.18E5	1.72E-7	2.98E0	-6.57
2079-03-01.946	80458.946	-0.637	1.50 ± 0.008	1.85E5	2.82E-6	3.04E0	-5.37
2081-02-28.956	81188.956	1.018	0.08 ± 2.480	3.41E8	9.50E-10	3.12E0	-8.85
2081-03-01.360	81189.360	-2.578	1.31 ± 0.110	7.88E4	5.24E-7	2.97E0	-6.13
2081-03-01.381	81189.381	-3.287	1.49 ± 0.079	2.21E5	2.28E-8	2.95E0	-7.49
2082-03-01.365	81554.365	-0.716	1.21 ± 0.063	1.48E8	4.95E-9	3.05E0	-8.15
2087-03-02.085	83381.085	-0.400	1.27 ± 0.020	3.07E5	2.74E-6	3.05E0	-5.44
2090-03-01.568	84476.568	-0.661	1.65 ± 0.011	4.29E6	6.12E-8	3.04E0	-7.12
2090-03-01.681	84476.681	-0.973	0.20 ± 0.016	1.08E7	7.78E-8	3.03E0	-7.01
2093-03-01.275	85572.275	-1.529	1.44 ± 0.000	3.04E7	7.43E-9	3.01E0	-8.06
2094-03-01.631	85937.631	4.730	1.04 ± 0.017	3.25E4	4.64E-10	3.27E0	-9.24
2100-03-01.820	88128.820	0.972	0.47 ± 0.035	1.86E7	4.34E-8	3.12E0	-7.32
2100-03-01.903	88128.903	0.961	0.87 ± 0.260	1.94E6	4.10E-7	3.12E0	-6.34
2108-03-02.153	91051.153	-0.677	1.62 ± 0.000	2.06E8	5.17E-9	3.06E0	-8.29


Based on 24 optical observations (of which 0 are rejected as outliers) from 2026/02/06.288 to 2026/02/12.418.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.73 and 1.73 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260212 142043.061 UTC.

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