Asteroids

2022EF4 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.771

Aphelion (Q)

1.887

Eccentricity (e)

0.420

Inclination (i)

4.5

deg

Orbit period (P)

559.5

Earth MOID

0.01497

U parameter

7.7

Next Earth close approach

Date

2028-08-15

Nominal distance (from Earth center)

0.10329

15452433

Maximum Brightness

24.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

20 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2022-03-08

Observatory

Pan-STARRS 2, Haleakala

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

1.328901

1-sigma variation

0.000643

Unit

Eccentricity (e)

Value

0.420191

1-sigma variation

0.000406

Unit

Inclination (i)

Value

4.4852

1-sigma variation

0.0035

Unit

Long. of Ascending Node (Ω)

Value

185.7748

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

64.8376

1-sigma variation

0.0012

Unit

Mean Anomaly (M)

Value

240.82975

1-sigma variation

0.69625

Unit

Perihelion distance

Value

0.770508

1-sigma variation

Unit

Aphelion distance

Value

1.887293

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.069176

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.330244

1-sigma variation

Unit

MOID

Value

0.014970

1-sigma variation

Unit

Orbit Period

Value

559.5479

1-sigma variation

Unit

U parameter

Value

7.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.13018E-7	2.60840E-7	2.24916E-6	2.61572E-7	7.85432E-7	-4.47457E-4
e	2.60840E-7	1.64733E-7	1.42042E-6	1.65383E-7	4.96041E-7	-2.82590E-4
i	2.24916E-6	1.42042E-6	1.22497E-5	1.41610E-6	4.28017E-6	-2.43670E-3
Ω	2.61572E-7	1.65383E-7	1.41610E-6	2.15046E-7	4.84710E-7	-2.83389E-4
ω	7.85432E-7	4.96041E-7	4.28017E-6	4.84710E-7	1.50685E-6	-8.50924E-4
M	-4.47457E-4	-2.82590E-4	-2.43670E-3	-2.83389E-4	-8.50924E-4	4.84767E-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

25.668

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

20 - 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

[-]

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

1525

Unit

Source

[1]

Normalized RMS of residuals

Value

0.543872

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2022-03-08.37777

Unit

Source

[2]

Last Observation

Value

2022-03-15.132269

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

54 (3)

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 2022EF4 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
EARTH	1950-04-20 05:42	> 1 mo	0.1929300	0.0577323	3.8702592
EARTH	1956-08-26 19:36	> 1 mo	0.0793890	0.0465735	6.5233068
EARTH	1973-03-19 04:18	> 1 mo	0.0502364	0.0160801	3.3191904
EARTH	1979-08-23 11:14	> 1 mo	0.0465328	0.0463308	0.1523218
EARTH	1996-03-14 18:17	> 1 w	0.0162136	0.0153451	0.0325892
EARTH	2002-08-01 06:19	> 1 w	0.1666080	0.0400411	0.0663019
EARTH	2022-03-16 13:38	< 1 s	0.0177238	0.0176759	0.0000160
EARTH	2028-08-15 04:45	> 1 d	0.1032931	0.0474534	0.0236377
EARTH	2045-03-11 02:21	> 1 d	0.0744493	0.0152853	0.0744177
EARTH	2051-08-05 03:23	> 1 w	0.1566876	0.0403595	0.0817172
EARTH	2071-03-31 13:34	> 1 w	0.1281720	0.0221205	0.0933797
EARTH	2077-08-24 03:56	> 1 d	0.0455125	0.0455109	0.0001915
EARTH	2094-03-11 15:24	> 1 w	0.0754284	0.0142063	0.2184715
EARTH	2100-07-20 07:24	> 1 mo	0.1988847	0.0382573	0.0921444
EARTH	2103-09-04 01:06	> 1 d	0.1664145	0.0444520	0.1288204
EARTH	2120-04-01 06:13	> 1 w	0.1281003	0.0209585	0.1111802
EARTH	2126-08-26 21:19	> 1 w	0.0469295	0.0445566	0.0644701

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
307.00882606	72.46039603	0.01528899	MINIMUM
56.23765124	229.96535494	0.04636472	MINIMUM
2.41262277	152.42103995	0.25380774	SADDLE
180.86741259	330.05844250	0.90660815	SADDLE
1.48488610	330.95572618	1.75493095	SADDLE
180.47842774	149.81926281	2.90138917	MAXIMUM

Download:

MOID Plots

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