Asteroids

2026RW1 help

Last update: 2026-09-09 14:06 UTC

Orbital Properties

Epoch

61289.1

MJD

Orbit type

Aten

Perihelion (q)

0.760

Aphelion (Q)

1.124

Eccentricity (e)

0.193

Inclination (i)

1.5

deg

Orbit period (P)

334.1

Earth MOID

3.204E-6

U parameter

4.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object impacted Earth on 2026-09-06 16:07:39

Physical Properties

Absolute Magnitude (H)

33.5

mag

Diameter

0.5 - 1.2*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-06

Observatory

University of Arizona 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

61289.1262

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.942248

1-sigma variation

0.000001

Unit

Eccentricity (e)

Value

0.193377

1-sigma variation

0.000008

Unit

Inclination (i)

Value

1.5307

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

343.7639

1-sigma variation

6.243E-6

Unit

Arg. of Perihelion (ω)

Value

121.2113

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

258.53120

1-sigma variation

0.00098

Unit

Perihelion distance

Value

0.760039

1-sigma variation

Unit

Aphelion distance

Value

1.124457

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000021

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.167958

1-sigma variation

Unit

MOID

Value

0.000003

1-sigma variation

Unit

Orbit Period

Value

334.0769

1-sigma variation

Unit

U parameter

Value

4.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.40492E-12	-9.31425E-12	-9.11462E-11	7.15385E-12	4.06363E-11	-1.10471E-9
e	-9.31425E-12	6.44161E-11	6.28047E-10	-4.91589E-11	-4.14633E-10	7.79596E-9
i	-9.11462E-11	6.28047E-10	6.18239E-9	-4.81174E-10	-3.92563E-9	7.58750E-8
Ω	7.15385E-12	-4.91589E-11	-4.81174E-10	3.89734E-11	3.00920E-10	-5.93294E-9
ω	4.06363E-11	-4.14633E-10	-3.92563E-9	3.00920E-10	9.08981E-9	-5.76733E-8
M	-1.10471E-9	7.79596E-9	7.58750E-8	-5.93294E-9	-5.76733E-8	9.52250E-7

Date of computation: 2026-09-09 14:06 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

33.538

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

0.5 - 1.2*

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

0.602756

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-05.52382801

Unit

Source

[2]

Last Observation

Value

2026-09-06.63538287

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

30 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2026RW1 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	1956-05-02 16:47	124.7	0.0345289	0.0329806	0.0005232
EARTH	1957-09-06 00:46	207.8	0.0569800	0.0487821	0.0027327
EARTH	1968-06-01 18:51	> 1 w	0.0847709	0.0525573	0.0110287
EARTH	1968-12-02 12:01	> 1 w	0.1939629	0.1790506	0.0049718
EARTH	1979-05-09 00:21	1139.4	0.1884130	0.1074377	0.0271272
EARTH	1980-02-02 12:28	> 1 w	0.1961439	0.1812074	0.0050664
EARTH	1980-08-15 01:13	> 1 w	0.0727790	0.0230420	0.0167416
EARTH	1991-05-03 19:26	208.2	0.0559303	0.0544267	0.0005029
EARTH	1992-09-06 03:07	33.2	0.0322986	0.0212997	0.0036665
EARTH	2003-03-08 19:29	> 1 d	0.1562242	0.1526021	0.0012100
EARTH	2003-06-29 13:47	> 1 d	0.1024003	0.1017248	0.0002258
EARTH	2003-11-15 18:34	> 1 d	0.1748676	0.1722408	0.0008756
EARTH	2014-05-05 04:31	28.0	0.0800491	0.0795758	0.0001578
EARTH	2015-09-07 01:21	1.6	0.0216730	0.0211767	0.0001654
EARTH	2025-05-08 02:17	< 1 min	0.1208769	0.1208423	0.0000115
EARTH	2026-09-06 16:14	< 1 s	0.0000032	0.0000032	0.0000000

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
248.35667276	240.22586813	0.00003841	MINIMUM
110.98583556	120.20100543	0.02231071	MINIMUM
179.13201865	179.80282332	0.10322536	SADDLE
359.61141465	0.05850235	0.21234018	SADDLE
0.01417348	180.53262343	1.78874408	SADDLE
180.08825036	0.60956101	2.10086469	MAXIMUM

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MOID Plots

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