Asteroids

2026SS help

Last update: 2026-09-24 12:45 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.642

Aphelion (Q)

2.033

Eccentricity (e)

0.520

Inclination (i)

6.5

deg

Orbit period (P)

565.0

Earth MOID

0.00512

U parameter

7.8

Next Earth close approach

Date

2033-03-15

Nominal distance (from Earth center)

0.11146

16674120

Maximum Brightness

26.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.2

mag

Diameter

6 - 13*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-18

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.337507

1-sigma variation

0.000887

Unit

Eccentricity (e)

Value

0.519638

1-sigma variation

0.000476

Unit

Inclination (i)

Value

6.4624

1-sigma variation

0.0068

Unit

Long. of Ascending Node (Ω)

Value

354.7839

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

95.5842

1-sigma variation

0.0015

Unit

Mean Anomaly (M)

Value

26.12347

1-sigma variation

0.01167

Unit

Perihelion distance

Value

0.642488

1-sigma variation

Unit

Aphelion distance

Value

2.032526

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.024669

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.064758

1-sigma variation

Unit

MOID

Value

0.005116

1-sigma variation

Unit

Orbit Period

Value

564.9923

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.87046E-7	4.22356E-7	6.00898E-6	1.52252E-7	-1.30087E-6	-1.03549E-5
e	4.22356E-7	2.26653E-7	3.22477E-6	8.17090E-8	-6.97819E-7	-5.55682E-6
i	6.00898E-6	3.22477E-6	4.59035E-5	1.16369E-6	-9.91058E-6	-7.90594E-5
Ω	1.52252E-7	8.17090E-8	1.16369E-6	2.95612E-8	-2.50885E-7	-2.00317E-6
ω	-1.30087E-6	-6.97819E-7	-9.91058E-6	-2.50885E-7	2.19120E-6	1.71153E-5
M	-1.03549E-5	-5.55682E-6	-7.90594E-5	-2.00317E-6	1.71153E-5	1.36237E-4

Date of computation: 2026-09-24 12:45 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

28.222

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

0.716049

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-17.336218

Unit

Source

[2]

Last Observation

Value

2026-09-19.862252

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 2026SS 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
VENUS	1951-04-30 14:45	> 1 d	0.0157725	0.0140583	0.0121066
VENUS	1954-05-29 12:46	> 1 w	0.0264062	0.0135608	0.2186388
EARTH	1955-09-26 19:44	> 1 w	0.1049351	0.0007841	0.2248832
EARTH	1962-03-16 23:36	> 1 w	0.0926324	0.0159420	0.1432962
EARTH	1972-09-17 15:05	> 1 d	0.0356162	0.0032235	0.1090918
EARTH	1999-03-24 06:06	686.7	0.0207433	0.0147634	0.0058026
EARTH	2009-09-28 05:38	> 1 d	0.1218510	0.0048072	0.0390359
EARTH	2016-03-21 03:33	> 1 d	0.0316368	0.0152491	0.0581355
EARTH	2026-09-20 14:37	< 1 min	0.0052345	0.0052194	0.0000050
EARTH	2033-03-15 14:32	> 1 d	0.1114596	0.0174754	0.0385994
VENUS	2039-04-20 20:06	> 1 w	0.0148363	0.0116822	0.0468503
EARTH	2043-09-27 02:49	> 1 w	0.0995716	0.0052672	0.1756304
EARTH	2050-03-27 14:42	> 1 w	0.0806535	0.0167247	0.2673214
EARTH	2057-09-11 15:27	> 1 w	0.1739546	0.0032531	0.2891528
EARTH	2064-03-07 23:02	> 1 mo	0.1772003	0.0256447	0.2615099
EARTH	2074-10-02 16:15	> 1 w	0.1606776	0.0026562	0.2152056
VENUS	2078-01-21 22:33	> 1 w	0.0142986	0.0111385	0.1305549
EARTH	2081-04-01 15:23	> 1 w	0.1794107	0.0227539	0.3141069
EARTH	2088-09-21 15:49	> 1 mo	0.0178925	0.0076965	0.5484439
EARTH	2095-04-02 12:52	> 1 mo	0.1899806	0.0190955	1.3099347
EARTH	2102-10-01 11:33	> 1 mo	0.1361454	0.0043243	3.4954033
VENUS	2104-07-08 07:31	> 1 mo	0.0273961	0.0106611	4.1751898
EARTH	2120-03-17 15:23	> 1 mo	0.0981365	0.0189693	13.5012750

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
298.65150454	255.20444360	0.00511623	MINIMUM
60.25310401	78.28235089	0.01481479	MINIMUM
359.18400163	346.31868961	0.35272679	SADDLE
179.72423128	167.19081116	1.03062661	SADDLE
359.39496090	166.69731380	1.65457622	SADDLE
179.87791737	347.28151560	3.01202600	MAXIMUM

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MOID Plots

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