Asteroids

2026SZ2 help

Last update: 2026-09-23 13:01 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Aten

Perihelion (q)

0.602

Aphelion (Q)

1.010

Eccentricity (e)

0.253

Inclination (i)

6.5

deg

Orbit period (P)

264.4

Earth MOID

0.00078

U parameter

5.2

Next Earth close approach

Date

2034-10-04

Nominal distance (from Earth center)

0.1904

28483376

Maximum Brightness

30.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

30.6

mag

Diameter

2.0 - 4*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-20

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

0.806257

1-sigma variation

0.000005

Unit

Eccentricity (e)

Value

0.252997

1-sigma variation

0.000014

Unit

Inclination (i)

Value

6.5158

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

177.3933

1-sigma variation

4.335E-5

Unit

Arg. of Perihelion (ω)

Value

349.0286

1-sigma variation

0.0038

Unit

Mean Anomaly (M)

Value

328.81563

1-sigma variation

0.00760

Unit

Perihelion distance

Value

0.602276

1-sigma variation

Unit

Aphelion distance

Value

1.010238

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.390147

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000852

1-sigma variation

Unit

MOID

Value

0.000778

1-sigma variation

Unit

Orbit Period

Value

264.4288

1-sigma variation

Unit

U parameter

Value

5.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.49169E-11	-6.73614E-11	-1.16592E-9	-2.14575E-10	1.84546E-8	-3.75700E-8
e	-6.73614E-11	1.83020E-10	3.13604E-9	5.85400E-10	-5.05176E-8	1.02595E-7
i	-1.16592E-9	3.13604E-9	5.60786E-8	9.96604E-9	-8.52559E-7	1.73997E-6
Ω	-2.14575E-10	5.85400E-10	9.96604E-9	1.87908E-9	-1.62569E-7	3.29511E-7
ω	1.84546E-8	-5.05176E-8	-8.52559E-7	-1.62569E-7	1.40985E-5	-2.85312E-5
M	-3.75700E-8	1.02595E-7	1.73997E-6	3.29511E-7	-2.85312E-5	5.78041E-5

Date of computation: 2026-09-23 13:01 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

30.615

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

2.0 - 4*

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

0.5

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.524413

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-20.288964

Unit

Source

[2]

Last Observation

Value

2026-09-20.822135

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

34 (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 2026SZ2 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	1953-06-05 02:42	520.2	0.0632288	0.0485839	0.0212140
EARTH	1961-09-19 01:45	603.9	0.1731348	0.1344003	0.0129115
EARTH	1968-09-16 12:22	> 1 d	0.0349826	0.0000835	0.0117759
EARTH	1975-06-04 21:04	160.7	0.0492946	0.0486522	0.0007458
EARTH	1983-09-22 15:46	2.4	0.0241133	0.0225895	0.0005079
EARTH	1990-04-05 22:03	> 1 d	0.1886669	0.1870056	0.0005552
EARTH	1990-08-14 20:19	998.8	0.0895403	0.0884905	0.0003505
EARTH	1997-06-16 04:22	653.6	0.0684575	0.0662570	0.0007472
EARTH	2004-06-05 15:44	45.7	0.0858650	0.0823960	0.0011685
EARTH	2012-09-18 08:26	24.7	0.1836211	0.1817895	0.0006105
EARTH	2019-09-22 09:29	4.4	0.0324958	0.0316654	0.0002768
EARTH	2026-09-20 21:18	< 1 s	0.0001418	0.0001417	0.0000000
EARTH	2034-10-04 01:00	10.5	0.1903996	0.1891930	0.0004022
EARTH	2039-08-23 02:40	30.0	0.1188710	0.1171212	0.0005841
EARTH	2047-09-26 09:42	201.1	0.0201327	0.0182508	0.0006279
EARTH	2060-09-30 05:41	765.9	0.0476986	0.0340488	0.0045871
EARTH	2065-08-22 05:26	72.2	0.1450471	0.1349635	0.0033775
EARTH	2073-10-04 05:49	6.0	0.1727407	0.1711098	0.0005437
EARTH	2078-09-04 06:30	467.8	0.0401046	0.0370638	0.0010229
EARTH	2091-09-15 15:56	> 1 d	0.0114697	0.0034959	0.0027445
EARTH	2099-10-04 11:05	630.6	0.1249487	0.0244531	0.0377827
EARTH	2112-09-01 02:53	> 1 w	0.0530416	0.0240689	0.0661651
EARTH	2120-09-27 20:24	> 1 w	0.0301273	0.0057862	0.0541980

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
194.40803129	255.48873316	0.00077757	MINIMUM
4.66852255	68.14864892	0.39043630	SADDLE
5.24362689	248.86513094	1.60767679	SADDLE
183.32664845	66.90577181	2.00254452	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026SZ2

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2102-09-19.821	89060.821	-1.963	1.73 ± 0.000	9.37E5	2.13E-7	4.69E-4	-9.69
2102-09-19.838	89060.838	-1.963	2.41 ± 0.006	6.38E5	2.59E-7	4.69E-4	-9.61
2120-09-19.345	95635.345	-4.617	1.94 ± 0.007	5.41E4	5.70E-10	4.70E-4	-12.36
2120-09-19.421	95635.421	-1.693	0.98 ± 0.001	1.09E5	3.84E-6	4.69E-4	-8.53
2121-09-19.402	96000.402	1.154	1.08 ± 0.000	8.66E6	1.02E-7	4.69E-4	-10.11
2123-09-20.087	96731.087	1.008	1.54 ± 0.004	6.99E5	1.27E-6	4.70E-4	-9.02
2125-09-19.297	97461.297	-1.701	1.82 ± 0.004	2.86E6	1.04E-7	4.69E-4	-10.12
2125-09-19.328	97461.328	-1.701	2.00 ± 0.000	1.41E6	1.89E-7	4.69E-4	-9.86
2126-09-19.768	97826.768	1.038	1.36 ± 0.000	1.18E6	7.84E-7	4.69E-4	-9.25


Based on 34 optical observations (of which 0 are rejected as outliers) from 2026/09/20.289 to 2026/09/20.822.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.40 and 2.41 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260923 134354.024 UTC.

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