Asteroids

2026CS1 help

Last update: 2026-02-11 16:45 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.857

Aphelion (Q)

2.178

Eccentricity (e)

0.435

Inclination (i)

2.6

deg

Orbit period (P)

682.5

Earth MOID

0.00032

U parameter

6.6

Next Earth close approach

Date

2038-02-03

Nominal distance (from Earth center)

0.04145

6200839

Maximum Brightness

27.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

31.3

mag

Diameter

1.5 - 3*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-02-06

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.517130

1-sigma variation

0.000196

Unit

Eccentricity (e)

Value

0.435445

1-sigma variation

0.000086

Unit

Inclination (i)

Value

2.6447

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

137.7939

1-sigma variation

1.320E-5

Unit

Arg. of Perihelion (ω)

Value

56.0039

1-sigma variation

0.0006

Unit

Mean Anomaly (M)

Value

296.96899

1-sigma variation

0.01305

Unit

Perihelion distance

Value

0.856503

1-sigma variation

Unit

Aphelion distance

Value

2.177757

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002100

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.609952

1-sigma variation

Unit

MOID

Value

0.000319

1-sigma variation

Unit

Orbit Period

Value

682.5470

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.83848E-8	1.69364E-8	8.38376E-8	-2.55301E-9	1.19150E-7	2.55626E-6
e	1.69364E-8	7.47288E-9	3.69897E-8	-1.12616E-9	5.26076E-8	1.12788E-6
i	8.38376E-8	3.69897E-8	1.83363E-7	-5.58598E-9	2.59782E-7	5.58333E-6
Ω	-2.55301E-9	-1.12616E-9	-5.58598E-9	1.74355E-10	-7.84133E-9	-1.70042E-7
ω	1.19150E-7	5.26076E-8	2.59782E-7	-7.84133E-9	3.80510E-7	7.93198E-6
M	2.55626E-6	1.12788E-6	5.58333E-6	-1.70042E-7	7.93198E-6	1.70236E-4

Date of computation: 2026-02-11 16:45 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

31.263

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

1.5 - 3*

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

0.607139

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-02-06.284945

Unit

Source

[2]

Last Observation

Value

2026-02-07.287236

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

35 (6)

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 2026CS1 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	1955-02-12 21:31	1165.2	0.0432091	0.0288366	0.0047917
EARTH	1968-06-03 22:08	884.0	0.0430791	0.0419134	0.0012012
EARTH	1983-03-12 19:15	> 1 w	0.1270526	0.0990406	0.0093876
EARTH	1996-06-15 02:02	> 1 d	0.1216047	0.0489974	0.0276787
EARTH	1998-01-25 00:42	> 1 d	0.1725585	0.0826415	0.0299752
EARTH	2011-04-23 15:25	> 1 d	0.1428274	0.1308408	0.0040597
EARTH	2026-02-07 08:21	< 1 s	0.0006265	0.0006262	0.0000001
EARTH	2038-02-03 19:48	> 1 d	0.0414501	0.0003068	0.0154555
EARTH	2043-06-30 02:20	83.5	0.1761694	0.1691092	0.0023544
EARTH	2055-06-18 03:33	> 1 d	0.0267829	0.0260086	0.0093118
EARTH	2067-06-03 04:32	> 1 mo	0.0918504	0.0255493	0.2483019
EARTH	2079-04-29 01:00	> 1 mo	0.1590176	0.0490591	0.0975607
EARTH	2091-03-26 22:50	> 1 mo	0.1554720	0.0322488	0.1275867
EARTH	2103-02-20 21:02	> 1 mo	0.0768930	0.0005271	0.3532441
EARTH	2115-02-07 16:20	> 1 d	0.0188727	0.0012983	0.0764237
EARTH	2120-06-26 20:27	> 1 mo	0.1041446	0.0251974	0.5814807

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
323.37410285	36.25618370	0.00031861	MINIMUM
40.97340458	153.65100749	0.04161112	MINIMUM
3.15013346	96.33586949	0.15003151	SADDLE
181.03545602	273.56887661	1.17932218	SADDLE
2.44026213	275.20539153	1.85569874	SADDLE
180.90460983	93.48777088	3.17885741	MAXIMUM

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MOID Plots

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