Asteroids

2023SE2 help

Last update: 2025-02-19 13:28 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.471

Aphelion (Q)

3.865

Eccentricity (e)

0.783

Inclination (i)

3.8

deg

Orbit period (P)

1166.3

Earth MOID

0.00498

U parameter

9.0

Next Earth close approach

Date

2046-04-21

Nominal distance (from Earth center)

0.10269

15361783

Maximum Brightness

24.1

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

19 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-09-18

Observatory

Kitt Peak-Bok

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

2.168368

1-sigma variation

0.017029

Unit

Eccentricity (e)

Value

0.782630

1-sigma variation

0.002104

Unit

Inclination (i)

Value

3.8054

1-sigma variation

0.0120

Unit

Long. of Ascending Node (Ω)

Value

186.7503

1-sigma variation

0.0041

Unit

Arg. of Perihelion (ω)

Value

277.6178

1-sigma variation

0.0089

Unit

Mean Anomaly (M)

Value

166.75803

1-sigma variation

1.94015

Unit

Perihelion distance

Value

0.471339

1-sigma variation

Unit

Aphelion distance

Value

3.865396

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.236953

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.063708

1-sigma variation

Unit

MOID

Value

0.004984

1-sigma variation

Unit

Orbit Period

Value

1166.2665

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.89990E-4	3.58312E-5	2.04026E-4	-6.91573E-5	1.51407E-4	-3.30390E-2
e	3.58312E-5	4.42731E-6	2.52094E-5	-8.54490E-6	1.87082E-5	-4.08231E-3
i	2.04026E-4	2.52094E-5	1.43547E-4	-4.86628E-5	1.06523E-4	-2.32450E-2
Ω	-6.91573E-5	-8.54490E-6	-4.86628E-5	1.65180E-5	-3.60864E-5	7.87921E-3
ω	1.51407E-4	1.87082E-5	1.06523E-4	-3.60864E-5	7.91054E-5	-1.72500E-2
M	-3.30390E-2	-4.08231E-3	-2.32450E-2	7.87921E-3	-1.72500E-2	3.76419E0

Date of computation: 2025-02-19 13:28 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

25.701

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

19 - 40*

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

592

Unit

Source

[1]

Normalized RMS of residuals

Value

0.687834

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-09-18.318212

Unit

Source

[2]

Last Observation

Value

2023-09-25.21793

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

35 (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

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 2023SE2 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	1953-09-18 01:17	> 1 mo	0.1235025	0.0135990	5.1448101
EARTH	1960-04-22 09:37	> 1 mo	0.1251218	0.0158227	3.8953466
EARTH	1988-09-18 20:39	> 1 mo	0.1048307	0.0108456	4.0773753
EARTH	1995-04-23 05:57	> 1 mo	0.1183647	0.0188945	3.3395437
VENUS	2007-12-31 02:33	> 1 mo	0.0469754	0.0452044	0.3688902
EARTH	2023-09-27 03:23	< 1 min	0.0196927	0.0195125	0.0000601
EARTH	2046-04-21 19:17	> 1 mo	0.1026872	0.0270782	1.3388338
EARTH	2062-04-11 02:56	> 1 mo	0.1067374	0.0279947	1.3099103
EARTH	2090-09-24 01:53	> 1 w	0.0478272	0.0051375	0.2295330
VENUS	2090-10-12 17:22	> 1 w	0.0353413	0.0096769	0.2665323
EARTH	2113-04-13 05:59	> 1 w	0.0948529	0.0341717	0.4398761
EARTH	2125-09-26 08:03	> 1 mo	0.0178630	0.0078829	0.6119568

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
313.43009358	261.60307040	0.00499540	MINIMUM
46.57155258	103.38539465	0.02220348	MINIMUM
0.01968627	2.48494987	0.51309195	SADDLE
0.05738237	182.58630611	1.48749923	SADDLE
179.99963325	182.52797196	2.85102049	SADDLE
180.01404756	2.53265816	4.84567769	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2023SE2

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2049-09-25.973	69709.973	1.479	0.71 ± 0.004	2.98E7	7.54E-9	1.69E-8	-7.72
2049-09-25.982	69709.982	1.508	0.97 ± 0.004	6.89E4	1.90E-6	4.27E-6	-5.31
2049-09-25.988	69709.988	1.560	0.29 ± 0.004	2.26E4	1.15E-5	2.58E-5	-4.53
2052-09-25.957	70805.957	0.862	0.89 ± 0.004	1.50E5	4.02E-6	8.56E-6	-5.05
2055-09-26.478	71901.478	0.265	0.30 ± 0.002	1.79E7	4.56E-8	9.35E-8	-7.05


Based on 35 optical observations (of which 0 are rejected as outliers) from 2023/09/18.318 to 2023/09/25.218.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.10 and 1.10 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250305 084554.912 UTC.

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