Asteroids

2026TY5 help

Last update: 2026-10-09 13:46 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Aten

Perihelion (q)

0.486

Aphelion (Q)

1.173

Eccentricity (e)

0.414

Inclination (i)

27.6

deg

Orbit period (P)

275.8

Earth MOID

0.02830

U parameter

7.0

Next Earth close approach

Date

2029-10-09

Nominal distance (from Earth center)

0.09756

14594225

Maximum Brightness

22.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.7

mag

Diameter

30 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-08

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

0.829218

1-sigma variation

0.000074

Unit

Eccentricity (e)

Value

0.414413

1-sigma variation

0.000244

Unit

Inclination (i)

Value

27.5879

1-sigma variation

0.0342

Unit

Long. of Ascending Node (Ω)

Value

16.5727

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

215.7220

1-sigma variation

0.0170

Unit

Mean Anomaly (M)

Value

208.41399

1-sigma variation

0.07070

Unit

Perihelion distance

Value

0.485580

1-sigma variation

Unit

Aphelion distance

Value

1.172857

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.037106

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.485965

1-sigma variation

Unit

MOID

Value

0.028303

1-sigma variation

Unit

Orbit Period

Value

275.8048

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.53911E-9	1.80867E-8	2.52801E-6	2.45878E-8	1.26530E-6	-5.25548E-6
e	1.80867E-8	5.96880E-8	8.35128E-6	8.09335E-8	4.13964E-6	-1.72467E-5
i	2.52801E-6	8.35128E-6	1.16911E-3	1.13200E-5	5.78672E-4	-2.41170E-3
Ω	2.45878E-8	8.09335E-8	1.13200E-5	1.09873E-7	5.62481E-6	-2.34173E-5
ω	1.26530E-6	4.13964E-6	5.78672E-4	5.62481E-6	2.89141E-4	-1.20163E-3
M	-5.25548E-6	-1.72467E-5	-2.41170E-3	-2.34173E-5	-1.20163E-3	4.99818E-3

Date of computation: 2026-10-09 13:46 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

24.73

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

30 - 70*

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

0.8

Unit

Source

[1]

Normalized RMS of residuals

Value

0.601986

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-07.436582

Unit

Source

[2]

Last Observation

Value

2026-10-09.385914

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (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 2026TY5 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	1955-10-09 16:28	> 1 d	0.1268215	0.0395087	0.1511835
EARTH	1958-10-07 23:18	314.3	0.0299208	0.0286159	0.0357795
EARTH	1961-10-09 03:17	> 1 d	0.1133952	0.0314887	0.1178778
EARTH	1989-10-09 01:55	1193.5	0.1204606	0.0428611	0.0296736
EARTH	1992-10-07 14:07	90.3	0.0285888	0.0281902	0.0036718
EARTH	1995-10-09 20:00	608.8	0.1158377	0.0558549	0.0209540
EARTH	2023-10-10 00:34	74.2	0.1310099	0.1250299	0.0019974
EARTH	2026-10-08 04:37	< 1 min	0.0327317	0.0326308	0.0000336
EARTH	2029-10-09 01:59	64.9	0.0975564	0.0911518	0.0021419
EARTH	2057-10-11 15:44	1330.8	0.1802241	0.1284823	0.0176389
EARTH	2060-10-08 04:06	434.5	0.0796136	0.0316369	0.0200453
EARTH	2063-10-08 20:08	336.9	0.0426464	0.0275820	0.0178505
EARTH	2066-10-10 18:03	785.1	0.1544169	0.0870950	0.0228360
EARTH	2094-10-09 04:49	343.3	0.1019232	0.0707223	0.0106915
EARTH	2097-10-08 07:04	98.7	0.0295743	0.0267171	0.0043663
EARTH	2100-10-10 23:19	366.6	0.1373805	0.1044788	0.0110578
EARTH	2125-10-13 10:08	1032.2	0.1912490	0.1538829	0.0126334

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
123.69800734	272.48741116	0.02830281	MINIMUM
299.46444661	47.30071524	0.43504926	MINIMUM
243.51533408	351.57154279	0.45991071	SADDLE
24.34085642	163.79050256	0.59689919	SADDLE
12.23781625	323.77786650	1.45504451	SADDLE
175.38377011	123.97546359	2.16221212	MAXIMUM

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MOID Plots

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