Asteroids

2023ET1 help

Last update: 2024-04-24 07:27 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.863

Aphelion (Q)

1.909

Eccentricity (e)

0.377

Inclination (i)

0.6

deg

Orbit period (P)

595.8

Earth MOID

0.00083

U parameter

7.3

Next Earth close approach

Date

2040-11-26

Nominal distance (from Earth center)

0.05741

8588607

Maximum Brightness

28.2

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

29.5

mag

Diameter

3 - 7*

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)
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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.385694

1-sigma variation

0.000438

Unit

Eccentricity (e)

Value

0.377405

1-sigma variation

0.000241

Unit

Inclination (i)

Value

0.6309

1-sigma variation

0.0003

Unit

Long. of Ascending Node (Ω)

Value

345.6519

1-sigma variation

0.0008

Unit

Arg. of Perihelion (ω)

Value

125.7867

1-sigma variation

0.0009

Unit

Mean Anomaly (M)

Value

260.05511

1-sigma variation

0.12719

Unit

Perihelion distance

Value

0.862726

1-sigma variation

Unit

Aphelion distance

Value

1.908662

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.517220

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.018170

1-sigma variation

Unit

MOID

Value

0.000830

1-sigma variation

Unit

Orbit Period

Value

595.7985

1-sigma variation

Unit

U parameter

Value

7.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.91827E-7	1.05536E-7	1.52334E-7	-2.68672E-7	1.67656E-7	-5.57058E-5
e	1.05536E-7	5.80643E-8	8.38392E-8	-1.46996E-7	9.08884E-8	-3.06470E-5
i	1.52334E-7	8.38392E-8	1.21404E-7	-2.02562E-7	1.16266E-7	-4.42359E-5
Ω	-2.68672E-7	-1.46996E-7	-2.02562E-7	6.51403E-7	-6.69499E-7	7.80519E-5
ω	1.67656E-7	9.08884E-8	1.16266E-7	-6.69499E-7	8.45458E-7	-4.87376E-5
M	-5.57058E-5	-3.06470E-5	-4.42359E-5	7.80519E-5	-4.87376E-5	1.61767E-2

Date of computation: 2024-04-23 10:08 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

29.509

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

3 - 7*

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

[-]

Download this part as:

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
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

401

Unit

Source

[1]

Normalized RMS of residuals

Value

0.358855

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-03-14.290386

Unit

Source

[2]

Last Observation

Value

2023-03-20.483892

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

18 (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 2023ET1 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1954-11-07 11:36	> 1 mo	0.0388230	0.0112722	0.9639475
EARTH	1966-02-16 14:12	> 1 mo	0.0904453	0.0037059	0.7669587
EARTH	1984-11-30 10:33	> 1 mo	0.0849769	0.0116561	0.5209072
EARTH	1996-03-12 13:49	> 1 d	0.0189923	0.0007874	0.0495001
EARTH	2003-12-01 15:02	> 1 w	0.0833361	0.0117488	0.0364133
EARTH	2023-03-11 13:49	< 1 min	0.0029960	0.0029901	0.0000020
EARTH	2040-11-26 17:60	> 1 w	0.0574113	0.0102229	0.0412209
EARTH	2054-03-07 14:28	1417.1	0.0236722	0.0087413	0.0049809
EARTH	2067-03-20 22:03	> 1 d	0.1030345	0.0012395	0.0968049
EARTH	2071-11-03 11:09	> 1 d	0.1618605	0.0100912	0.1069201
EARTH	2084-11-15 07:05	> 1 w	0.0119934	0.0101499	0.0470212
MARS	2093-06-28 03:04	> 1 w	0.0141067	0.0078111	0.7154187
EARTH	2097-11-02 10:41	> 1 mo	0.1774495	0.0100528	1.3276956
EARTH	2106-03-18 10:33	> 1 mo	0.0503785	0.0024558	1.4063231
EARTH	2119-03-14 07:02	> 1 mo	0.0068263	0.0023406	2.2243165
EARTH	2123-11-22 07:34	> 1 mo	0.0174285	0.0094621	74.5231562

Download as:

2023ET1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2089-11-19.806	84374.806	-1.773	1.20 ± 0.002	4.96E7	4.19E-9	9.14E-12	-10.80
2099-03-10.189	87772.189	-0.564	1.59 ± 0.000	7.66E7	5.38E-9	1.17E-11	-10.76
2111-11-11.891	92400.891	0.750	0.77 ± 0.095	3.93E6	2.23E-7	4.89E-10	-9.21
2119-11-12.237	95323.237	0.335	1.16 ± 0.059	7.42E8	1.37E-9	2.99E-12	-11.46


Based on 18 optical observations (of which 0 are rejected as outliers) from 2023/03/14.290 to 2023/03/20.484.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.62 and 1.62 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20240110 090429.772 UTC.

Download this part as:

Download Impactor Table as: