Asteroids

2026CW1 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.377

Aphelion (Q)

1.436

Eccentricity (e)

0.584

Inclination (i)

9.1

deg

Orbit period (P)

315.2

Earth MOID

0.00081

U parameter

7.9

Next Earth close approach

Date

2045-02-10

Nominal distance (from Earth center)

0.07299

10919011

Maximum Brightness

25.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

11 - 24*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-02-11

Observatory

MARGO, Nauchnyi

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

0.906338

1-sigma variation

0.000372

Unit

Eccentricity (e)

Value

0.583922

1-sigma variation

0.000749

Unit

Inclination (i)

Value

9.1051

1-sigma variation

0.0191

Unit

Long. of Ascending Node (Ω)

Value

322.8709

1-sigma variation

0.0008

Unit

Arg. of Perihelion (ω)

Value

312.8558

1-sigma variation

0.0063

Unit

Mean Anomaly (M)

Value

66.95005

1-sigma variation

0.02147

Unit

Perihelion distance

Value

0.377107

1-sigma variation

Unit

Aphelion distance

Value

1.435569

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.585601

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.003802

1-sigma variation

Unit

MOID

Value

0.000814

1-sigma variation

Unit

Orbit Period

Value

315.1620

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.38290E-7	2.78500E-7	7.08827E-6	-2.94931E-7	2.33432E-6	7.98048E-6
e	2.78500E-7	5.60964E-7	1.42774E-5	-5.94062E-7	4.70625E-6	1.60789E-5
i	7.08827E-6	1.42774E-5	3.63393E-4	-1.51203E-5	1.19779E-4	4.09229E-4
Ω	-2.94931E-7	-5.94062E-7	-1.51203E-5	6.29149E-7	-4.98403E-6	-1.70276E-5
ω	2.33432E-6	4.70625E-6	1.19779E-4	-4.98403E-6	3.96777E-5	1.35087E-4
M	7.98048E-6	1.60789E-5	4.09229E-4	-1.70276E-5	1.35087E-4	4.61058E-4

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

26.971

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

11 - 24*

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

0.944026

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-02-10.361099

Unit

Source

[2]

Last Observation

Value

2026-02-12.217665

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

20 (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 2026CW1 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	1952-02-10 06:00	> 1 d	0.0775286	0.0008818	0.0524664
EARTH	1955-11-09 16:08	1384.6	0.1580718	0.1564405	0.0056337
EARTH	1958-02-12 14:51	862.7	0.0356630	0.0004154	0.0365724
EARTH	1961-11-13 01:50	720.9	0.1867223	0.1714174	0.0055903
EARTH	1964-02-12 17:19	84.8	0.1672448	0.1606141	0.0022104
EARTH	1989-02-09 19:27	> 1 d	0.0726580	0.0000338	0.1415019
EARTH	1992-11-09 09:36	> 1 d	0.1565864	0.1562015	0.0098845
EARTH	1995-02-13 08:40	> 1 d	0.0575049	0.0002253	0.1376111
MERCURY	1997-11-18 20:17	> 1 w	0.0459429	0.0414325	0.0749057
EARTH	2001-02-10 22:49	> 1 d	0.1968652	0.0072111	0.0945227
MERCURY	2003-11-29 22:47	> 1 w	0.0436675	0.0408812	0.0515833
EARTH	2020-02-08 10:54	1129.9	0.1409757	0.0733643	0.0225374
EARTH	2023-11-09 03:10	217.4	0.1694249	0.1584233	0.0046825
EARTH	2026-02-12 10:57	< 1 s	0.0095221	0.0094767	0.0000151
EARTH	2045-02-10 02:22	> 1 d	0.0729891	0.0011984	0.0665317
EARTH	2048-11-11 05:58	> 1 d	0.1645882	0.1558911	0.0216906
EARTH	2051-02-13 07:04	> 1 d	0.1541128	0.0044519	0.0678414
EARTH	2064-02-07 13:53	> 1 d	0.1715372	0.0017053	0.0831822
EARTH	2067-11-09 12:44	> 1 d	0.1617501	0.1564714	0.0206966
EARTH	2070-02-13 14:45	1228.6	0.0656796	0.0019707	0.0842923
EARTH	2086-11-08 15:09	367.6	0.1851759	0.1581547	0.0152608
EARTH	2089-02-12 13:14	758.2	0.0098219	0.0020902	0.0238871
EARTH	2102-02-09 20:54	> 1 w	0.1272565	0.0024863	0.4332188
MERCURY	2103-02-21 11:22	> 1 mo	0.0414421	0.0409171	0.1106581
EARTH	2105-11-12 16:52	> 1 w	0.1659685	0.1562942	0.1890275
EARTH	2108-02-13 14:46	> 1 w	0.1903986	0.0087854	0.5680305
EARTH	2118-11-09 15:51	> 1 w	0.1758669	0.1559459	0.4195532
EARTH	2121-02-14 14:02	> 1 w	0.0590991	0.0030526	0.9713413
MERCURY	2126-07-01 21:46	> 1 mo	0.0430217	0.0412877	0.3716788

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
261.20646856	38.16023368	0.00081353	MINIMUM
97.53294048	303.69179292	0.15617092	MINIMUM
177.99650253	350.76362312	0.47285214	SADDLE
359.06900190	169.39001262	0.64366947	SADDLE
359.82031405	350.93991183	1.35894848	SADDLE
180.54675627	172.06022062	2.44823986	MAXIMUM

Download:

MOID Plots

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