Asteroids

2026RA40 help

Last update: 2026-09-16 20:15 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.630

Aphelion (Q)

1.041

Eccentricity (e)

0.246

Inclination (i)

16.9

deg

Orbit period (P)

278.7

Earth MOID

0.02580

U parameter

7.4

Next Earth close approach

Date

2039-09-22

Nominal distance (from Earth center)

0.15219

22767593

Maximum Brightness

25.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 25*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-15

Observatory

GINOP-KHK, Piszkesteto

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

0.835034

1-sigma variation

0.000140

Unit

Eccentricity (e)

Value

0.246110

1-sigma variation

0.000280

Unit

Inclination (i)

Value

16.8945

1-sigma variation

0.0373

Unit

Long. of Ascending Node (Ω)

Value

350.6206

1-sigma variation

0.0007

Unit

Arg. of Perihelion (ω)

Value

167.8243

1-sigma variation

0.0124

Unit

Mean Anomaly (M)

Value

74.83644

1-sigma variation

0.03256

Unit

Perihelion distance

Value

0.629524

1-sigma variation

Unit

Aphelion distance

Value

1.040543

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.026301

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.360889

1-sigma variation

Unit

MOID

Value

0.025797

1-sigma variation

Unit

Orbit Period

Value

278.7111

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.97029E-8	-3.91740E-8	-5.23011E-6	-8.67914E-8	-3.22256E-7	3.52802E-6
e	-3.91740E-8	7.86113E-8	1.03934E-5	1.65062E-7	3.12628E-7	-6.45791E-6
i	-5.23011E-6	1.03934E-5	1.38911E-3	2.31262E-5	8.84169E-5	-9.41374E-4
Ω	-8.67914E-8	1.65062E-7	2.31262E-5	4.61735E-7	4.83458E-6	-2.13351E-5
ω	-3.22256E-7	3.12628E-7	8.84169E-5	4.83458E-6	1.54240E-4	-3.10421E-4
M	3.52802E-6	-6.45791E-6	-9.41374E-4	-2.13351E-5	-3.10421E-4	1.06045E-3

Date of computation: 2026-09-16 20:15 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

26.894

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 - 25*

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

1.0

Unit

Source

[1]

Unobserved

Value

0.6

Unit

Source

[1]

Normalized RMS of residuals

Value

0.638296

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-15.84941

Unit

Source

[2]

Last Observation

Value

2026-09-16.821849

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

26 (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 2026RA40 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	1952-09-14 00:24	119.9	0.0264279	0.0261028	0.0001882
EARTH	1965-09-21 20:09	565.8	0.1629496	0.0849735	0.0275549
EARTH	1968-09-05 17:02	> 1 d	0.0979986	0.0447095	0.0275475
EARTH	1981-09-17 14:03	> 1 d	0.0512515	0.0293126	0.0396788
EARTH	1984-08-27 21:43	> 1 d	0.1937406	0.0962219	0.0402190
EARTH	1997-09-12 15:07	> 1 d	0.0346362	0.0270614	0.0179790
EARTH	2010-09-21 01:25	795.8	0.1182313	0.0653538	0.0189444
EARTH	2013-09-01 20:06	> 1 d	0.1391653	0.0985733	0.0143253
EARTH	2026-09-14 19:30	1.5	0.0262949	0.0261471	0.0000493
EARTH	2039-09-22 03:33	360.4	0.1521920	0.1029381	0.0168908
EARTH	2042-09-05 06:07	> 1 d	0.1070499	0.0619354	0.0170333
EARTH	2055-09-16 18:51	> 1 d	0.0357344	0.0270735	0.0191567
EARTH	2071-09-11 16:55	> 1 d	0.0465441	0.0292211	0.0300748
EARTH	2084-09-20 09:59	1135.2	0.1136419	0.0455299	0.0269141
EARTH	2087-09-01 21:10	> 1 d	0.1430115	0.0889906	0.0199396
EARTH	2100-09-15 17:17	91.9	0.0271904	0.0264684	0.0002834
EARTH	2113-09-23 01:59	215.5	0.1873679	0.1283694	0.0201842
EARTH	2116-09-09 05:19	> 1 d	0.0720003	0.0356916	0.0199207

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
196.89843851	248.03953567	0.02579712	MINIMUM
328.85878062	15.46463157	0.37377540	SADDLE
3.24148480	237.25667278	1.63847002	SADDLE
184.34451550	58.56836208	2.03074018	MAXIMUM

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MOID Plots

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