Asteroids

2022ET4 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.617

Aphelion (Q)

2.809

Eccentricity (e)

0.640

Inclination (i)

1.2

deg

Orbit period (P)

818.9

Earth MOID

0.01783

U parameter

7.8

Next Earth close approach

Date

2075-09-26

Nominal distance (from Earth center)

0.1596

23875389

Maximum Brightness

23.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

40 - 90*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2022-03-09

Observatory

Catalina Sky 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.712982

1-sigma variation

0.001357

Unit

Eccentricity (e)

Value

0.639629

1-sigma variation

0.000367

Unit

Inclination (i)

Value

1.1818

1-sigma variation

0.0005

Unit

Long. of Ascending Node (Ω)

Value

107.4177

1-sigma variation

0.0160

Unit

Arg. of Perihelion (ω)

Value

332.5394

1-sigma variation

0.0153

Unit

Mean Anomaly (M)

Value

344.20623

1-sigma variation

0.84228

Unit

Perihelion distance

Value

0.617308

1-sigma variation

Unit

Aphelion distance

Value

2.808655

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.338058

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.326706

1-sigma variation

Unit

MOID

Value

0.017835

1-sigma variation

Unit

Orbit Period

Value

818.8937

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.84270E-6	4.97548E-7	6.86836E-7	-2.15792E-5	2.05985E-5	-1.14336E-3
e	4.97548E-7	1.34343E-7	1.85449E-7	-5.82719E-6	5.56233E-6	-3.08719E-4
i	6.86836E-7	1.85449E-7	2.56348E-7	-8.00547E-6	7.64072E-6	-4.26169E-4
Ω	-2.15792E-5	-5.82719E-6	-8.00547E-6	2.57094E-4	-2.45487E-4	1.33895E-2
ω	2.05985E-5	5.56233E-6	7.64072E-6	-2.45487E-4	2.34416E-4	-1.27810E-2
M	-1.14336E-3	-3.08719E-4	-4.26169E-4	1.33895E-2	-1.27810E-2	7.09434E-1

Date of computation: 2026-03-17 23:26 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

23.986

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

40 - 90*

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 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

1508

Unit

Source

[1]

Normalized RMS of residuals

Value

0.53361

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2022-03-09.456472

Unit

Source

[2]

Last Observation

Value

2022-04-02.178561

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

125 (4)

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

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 2022ET4 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
VENUS	1952-07-18 19:57	> 1 d	0.0358340	0.0291034	0.0158544
1 Ceres	1982-09-12 14:22	> 1 d	0.0088992	0.0055802	0.0117071
VENUS	1990-09-05 05:35	> 1 w	0.0340441	0.0286250	0.0305769
EARTH	1992-09-27 13:57	> 1 w	0.1772934	0.0190504	0.0592053
EARTH	2001-09-14 09:07	> 1 d	0.0263142	0.0184984	0.0567195
EARTH	2010-09-09 08:59	> 1 d	0.0755179	0.0185282	0.0742655
EARTH	2013-03-14 22:33	> 1 d	0.1128283	0.0180526	0.0650909
EARTH	2019-09-03 07:23	1120.4	0.1921306	0.1445204	0.0158944
EARTH	2022-03-08 05:14	< 1 s	0.0218030	0.0217645	0.0000128
1 Ceres	2070-02-24 17:56	> 1 d	0.0100808	0.0020917	0.0086799
VENUS	2073-07-25 09:48	> 1 w	0.0170763	0.0169945	0.0071971
EARTH	2075-09-26 22:10	> 1 w	0.1595971	0.0186352	0.2360468
EARTH	2084-09-09 17:21	> 1 mo	0.0722700	0.0184018	0.8838099
EARTH	2087-03-14 13:06	> 1 mo	0.0844347	0.0178476	0.9420199
EARTH	2096-02-26 05:13	> 1 mo	0.1567567	0.0188290	0.6470148
VENUS	2122-12-13 17:47	> 1 mo	0.0312994	0.0288445	0.4322059

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
48.94049065	66.03390454	0.01790545	MINIMUM
310.12985326	250.04482274	0.01850640	MINIMUM
359.24405079	337.64379578	0.36752613	SADDLE
359.24696954	157.66891266	1.63420597	SADDLE
179.83483716	158.44532348	1.79210612	SADDLE
179.84979279	338.45657085	3.79367358	MAXIMUM

Download:

MOID Plots

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