Asteroids

2023TB2 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.553

Aphelion (Q)

1.025

Eccentricity (e)

0.299

Inclination (i)

8.6

deg

Orbit period (P)

256.0

Earth MOID

0.00189

U parameter

5.3

Next Earth close approach

Date

2030-09-04

Nominal distance (from Earth center)

0.01632

2442013

Maximum Brightness

16.8

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

23.7

mag

Diameter

50 - 110*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-10-03

Observatory

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.789126

1-sigma variation

0.000006

Unit

Eccentricity (e)

Value

0.298670

1-sigma variation

0.000010

Unit

Inclination (i)

Value

8.6370

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

338.9951

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

194.4856

1-sigma variation

4.573E-5

Unit

Mean Anomaly (M)

Value

301.01199

1-sigma variation

0.00867

Unit

Perihelion distance

Value

0.553437

1-sigma variation

Unit

Aphelion distance

Value

1.024814

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002424

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.433335

1-sigma variation

Unit

MOID

Value

0.001889

1-sigma variation

Unit

Orbit Period

Value

256.0459

1-sigma variation

Unit

U parameter

Value

5.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.02580E-11	-5.58054E-11	-2.22839E-9	-1.08149E-9	1.82948E-10	-4.77049E-8
e	-5.58054E-11	1.02927E-10	4.11005E-9	1.99437E-9	-3.38029E-10	8.79844E-8
i	-2.22839E-9	4.11005E-9	1.64186E-7	7.98061E-8	-1.36845E-8	3.51337E-6
Ω	-1.08149E-9	1.99437E-9	7.98061E-8	3.95353E-8	-7.36597E-9	1.70499E-6
ω	1.82948E-10	-3.38029E-10	-1.36845E-8	-7.36597E-9	2.09100E-9	-2.88732E-7
M	-4.77049E-8	8.79844E-8	3.51337E-6	1.70499E-6	-2.88732E-7	7.52123E-5

Date of computation: 2025-07-29 02:36 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

23.705

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

50 - 110*

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

651

Unit

Source

[1]

Normalized RMS of residuals

Value

0.721678

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-09-07.450044

Unit

Source

[2]

Last Observation

Value

2023-11-03.845093

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

76 (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

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2023TB2 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1953-09-20 23:48	> 1 mo	0.0584192	0.0374581	8.3927117
EARTH	1960-09-01 11:18	> 1 mo	0.0033983	0.0029973	0.1120781
EARTH	1967-09-27 08:42	> 1 mo	0.0717644	0.0518369	0.1198695
EARTH	1974-10-10 20:13	> 1 d	0.1601199	0.0846959	0.1750891
EARTH	1983-08-25 06:20	> 1 d	0.1075707	0.0137755	0.1082265
EARTH	1990-09-01 06:33	191.2	0.0028707	0.0026653	0.0002820
EARTH	1997-08-24 18:43	22.9	0.0985365	0.0955823	0.0009850
EARTH	2009-10-09 10:55	20.9	0.1640444	0.1621648	0.0006280
EARTH	2016-10-01 16:54	75.2	0.0956433	0.0949383	0.0002359
EARTH	2023-09-16 23:50	< 1 min	0.0535832	0.0535766	0.0000022
EARTH	2030-09-04 16:31	99.1	0.0163238	0.0154508	0.0002913
EARTH	2037-09-08 23:48	269.5	0.0328890	0.0311350	0.0005861
EARTH	2044-09-23 12:47	398.3	0.0708264	0.0686488	0.0007353
EARTH	2051-10-07 03:51	164.3	0.1228110	0.1189787	0.0012924
EARTH	2067-08-25 04:06	31.6	0.1061073	0.0997642	0.0021153
EARTH	2074-08-28 07:04	186.8	0.0296450	0.0254872	0.0013870
EARTH	2081-08-30 03:40	328.5	0.0110439	0.0060370	0.0016728
EARTH	2088-08-24 13:18	197.8	0.1500417	0.0948226	0.0184650
EARTH	2093-10-10 12:35	166.2	0.1894875	0.1188878	0.0266513
EARTH	2100-09-27 20:14	> 1 w	0.0812052	0.0567977	0.0223581
EARTH	2107-09-01 08:34	> 1 d	0.0056163	0.0004024	0.0409541
EARTH	2112-10-09 23:59	> 1 mo	0.1361197	0.0898600	1.1081319
EARTH	2124-08-31 17:45	> 1 mo	0.0042141	0.0000871	4.2455966

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
159.79554282	237.11342884	0.00188912	MINIMUM
9.15392792	81.75100609	0.44419787	SADDLE
6.21810369	257.80740148	1.55727713	SADDLE
182.21722397	73.57242485	2.01931503	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2023TB2

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2110-09-01.794	91964.794	0.282	1.48 ± 0.006	6.20E5	1.50E-6	7.07E0	-5.56
2116-09-01.258	94156.258	0.357	1.03 ± 0.002	6.65E4	1.85E-5	7.08E0	-4.50
2119-09-02.122	95252.122	0.072	0.21 ± 0.002	3.76E5	4.02E-6	7.09E0	-5.17


Based on 76 optical observations (of which 1 are rejected as outliers) from 2023/09/07.450 to 2023/11/03.845.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.91 and 1.91 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: