Asteroids

2023ET2

Last update: 2023-03-30 23:53 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.693

Aphelion (Q)

1.841

Eccentricity (e)

0.453

Inclination (i)

5.0

deg

Orbit period (P)

520.9

Earth MOID

0.00012

U parameter

7.8

Next Earth close approach

Date

2026-03-11

Nominal distance (from Earth center)

0.02002

2995012

Maximum Brightness

25.3

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

30.6

mag

Diameter

2.8*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-03-14

Observatory

Mt. Lemmon Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.266982

1-sigma variation

0.000738

Unit

Eccentricity (e)

Value

0.453326

1-sigma variation

0.000429

Unit

Inclination (i)

Value

5.0200

1-sigma variation

0.0055

Unit

Ascending Node (Ω)

Value

351.4434

1-sigma variation

0.0052

Unit

Arg. of Perihelion (ω)

Value

91.7521

1-sigma variation

0.0391

Unit

Mean Anomaly (M)

Value

27.82996

1-sigma variation

0.03996

Unit

Perihelion

Value

0.692627

1-sigma variation

Unit

Aphelion

Value

1.841338

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.013766

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.000616

1-sigma variation

Unit

MOID

Value

0.000122

1-sigma variation

Unit

Orbit Period

Value

520.9000

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.45370E-7	2.71861E-7	1.96938E-6	-1.25637E-6	1.46348E-5	-2.94729E-5
e	2.71861E-7	1.84031E-7	2.04773E-6	4.49919E-7	-1.32671E-7	-1.51345E-5
i	1.96938E-6	2.04773E-6	3.05451E-5	1.91170E-5	-1.10381E-4	-1.16155E-4
Ω	-1.25637E-6	4.49919E-7	1.91170E-5	2.67801E-5	-1.98503E-4	5.80737E-5
ω	1.46348E-5	-1.32671E-7	-1.10381E-4	-1.98503E-4	1.53007E-3	-7.23132E-4
M	-2.94729E-5	-1.51345E-5	-1.16155E-4	5.80737E-5	-7.23132E-4	1.59682E-3

Date of computation: 2023-03-17 15:30 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

30.553

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

2.8*

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 ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

0.8

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.496292

Unit

arcsec

Source

[1]

First Observation

Value

2023-03-14.266922

Unit

Source

[2]

Last Observation

Value

2023-03-15.11461

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

10 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2023ET2 from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1958-09-11 00:31	> 1 mo	0.0880867	0.0006347	0.8219813
EARTH	1968-09-13 04:15	> 1 mo	0.0415624	0.0010000	0.7861409
EARTH	1978-09-09 16:41	> 1 mo	0.1162175	0.0003700	0.7610269
MARS	1988-07-12 01:49	> 1 d	0.0323758	0.0264221	0.1983493
VENUS	1997-06-05 01:51	> 1 w	0.0280546	0.0267041	0.0273489
EARTH	2013-03-19 03:12	> 1 d	0.1278214	0.0011975	0.0537078
EARTH	2023-03-12 18:26	6.1	0.0010504	0.0010365	0.0000046
EARTH	2026-03-11 04:48	1416.4	0.0200204	0.0003050	0.0146383
VENUS	2027-08-01 17:15	750.9	0.0449536	0.0363950	0.0031229
EARTH	2029-03-06 19:31	846.2	0.0739991	0.0524610	0.0071799
EARTH	2032-02-29 21:27	> 1 d	0.1260864	0.0443876	0.0272737
EARTH	2035-02-17 11:31	> 1 w	0.1798209	0.0636379	0.0391355
EARTH	2070-10-14 02:06	> 1 w	0.1767543	0.0168332	0.0533845
EARTH	2073-10-04 00:52	> 1 d	0.1327994	0.0069666	0.0472585
EARTH	2076-09-28 09:18	> 1 d	0.0856939	0.0104192	0.0308561
EARTH	2079-09-26 04:12	1200.3	0.0496234	0.0221396	0.0094889
EARTH	2082-09-24 09:22	1282.2	0.0288823	0.0126134	0.0135973
EARTH	2085-09-23 19:23	> 1 d	0.0246114	0.0125551	0.0261359
EARTH	2088-09-25 02:58	> 1 d	0.0452947	0.0126113	0.0240496
EARTH	2091-09-29 08:13	1058.7	0.0866518	0.0569920	0.0099496
EARTH	2094-10-04 19:45	1325.0	0.1350024	0.1178130	0.0057301
EARTH	2097-10-15 21:31	> 1 d	0.1820453	0.1297214	0.0174436

Download as:

2023ET2

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2028-09-14.123	62028.123	1.538	0.653	1.31 ± 1.289	3.56E5	1.11E-9	1.02E-12	-10.64	0


Based on 10 optical observations (of which 0 are rejected as outliers) from 2023/03/14.267 to 2023/03/15.115.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.31 and 1.31 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20230317 162518.534 UTC.

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