Asteroids

2026RW37 help

Last update: 2026-09-16 13:00 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.910

Aphelion (Q)

2.189

Eccentricity (e)

0.412

Inclination (i)

1.9

deg

Orbit period (P)

704.5

Earth MOID

0.00013

U parameter

7.8

Next Earth close approach

Date

2026-09-20

Nominal distance (from Earth center)

0.003

448467

Maximum Brightness

17.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

28.4

mag

Diameter

6 - 13*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-13

Observatory

Pan-STARRS 2, Haleakala

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

1.549535

1-sigma variation

0.001160

Unit

Eccentricity (e)

Value

0.412442

1-sigma variation

0.000490

Unit

Inclination (i)

Value

1.9396

1-sigma variation

0.0019

Unit

Long. of Ascending Node (Ω)

Value

358.2178

1-sigma variation

0.0027

Unit

Arg. of Perihelion (ω)

Value

46.9568

1-sigma variation

0.0057

Unit

Mean Anomaly (M)

Value

287.65951

1-sigma variation

0.08619

Unit

Perihelion distance

Value

0.910442

1-sigma variation

Unit

Aphelion distance

Value

2.188628

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.000866

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.793729

1-sigma variation

Unit

MOID

Value

0.000132

1-sigma variation

Unit

Orbit Period

Value

704.5316

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.34604E-6	5.67714E-7	2.18962E-6	1.47777E-7	-8.04971E-7	9.99958E-5
e	5.67714E-7	2.39656E-7	9.26864E-7	2.31619E-8	-2.56624E-7	4.21674E-5
i	2.18962E-6	9.26864E-7	3.61627E-6	-3.81611E-7	-1.07556E-9	1.62548E-4
Ω	1.47777E-7	2.31619E-8	-3.81611E-7	7.23500E-6	-1.53162E-5	1.23372E-5
ω	-8.04971E-7	-2.56624E-7	-1.07556E-9	-1.53162E-5	3.26739E-5	-6.26847E-5
M	9.99958E-5	4.21674E-5	1.62548E-4	1.23372E-5	-6.26847E-5	7.42885E-3

Date of computation: 2026-09-16 13:00 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

28.38

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

6 - 13*

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

0.759634

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-13.382262

Unit

Source

[2]

Last Observation

Value

2026-09-15.268904

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

19 (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

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 2026RW37 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	1972-12-14 22:56	> 1 d	0.0370733	0.0335360	0.0111634
EARTH	1974-09-05 12:42	> 1 d	0.1451198	0.0875971	0.0191775
EARTH	1999-10-14 18:46	> 1 mo	0.0688978	0.0106085	0.0708432
EARTH	2024-12-31 16:11	1424.8	0.1205759	0.0812574	0.0133950
EARTH	2026-09-20 20:54	3.2	0.0029978	0.0029865	0.0000038
EARTH	2041-09-08 22:47	> 1 w	0.1083352	0.0018097	0.1042291
EARTH	2055-01-08 04:12	> 1 d	0.1708923	0.0343274	0.1120579
EARTH	2069-12-24 07:29	> 1 w	0.0349903	0.0339282	0.0153348
EARTH	2084-12-12 22:33	> 1 mo	0.0529920	0.0345334	0.1955562
EARTH	2099-11-05 23:19	> 1 mo	0.0891562	0.0804802	0.0261963
EARTH	2114-10-03 20:43	> 1 mo	0.0454592	0.0007139	0.2574068

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
328.49867348	254.44898673	0.00013244	MINIMUM
27.68347860	342.86938917	0.03335890	MINIMUM
358.88543823	299.93053812	0.08446897	SADDLE
179.21984943	119.87187414	1.18071138	SADDLE
357.98703143	118.56471846	1.91862433	SADDLE
179.14807106	299.83170201	3.18008525	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026RW37

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2043-09-21.593	67513.593	1.091	1.17 ± 0.008	1.40E6	3.65E-7	1.35E-2	-7.67
2045-09-20.897	68243.897	1.076	1.06 ± 0.438	4.62E7	1.25E-8	1.35E-2	-9.17
2052-09-20.741	70800.741	1.035	0.67 ± 0.007	9.58E5	7.32E-7	1.35E-2	-7.54
2054-09-21.324	71531.324	0.973	0.86 ± 0.055	2.22E5	3.19E-6	1.35E-2	-6.93
2058-09-21.225	72992.225	1.189	0.69 ± 0.204	1.97E5	3.07E-6	1.35E-2	-7.00
2065-09-20.981	75548.981	1.035	0.67 ± 0.358	6.66E7	1.07E-8	1.36E-2	-9.54


Based on 19 optical observations (of which 0 are rejected as outliers) from 2026/09/13.382 to 2026/09/15.269.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.65 and 1.65 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260916 133229.051 UTC.

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