Asteroids

2021RL14 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.944

Aphelion (Q)

2.912

Eccentricity (e)

0.510

Inclination (i)

1.2

deg

Orbit period (P)

978.0

Earth MOID

0.00119

U parameter

6.8

Next Earth close approach

Date

2080-06-24

Nominal distance (from Earth center)

0.02654

3970933

Maximum Brightness

22.1

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-09-13

Observatory

ATLAS-HKO, 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.928258

1-sigma variation

0.000417

Unit

Eccentricity (e)

Value

0.510335

1-sigma variation

0.000112

Unit

Inclination (i)

Value

1.2322

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

171.3506

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

141.3557

1-sigma variation

0.0004

Unit

Mean Anomaly (M)

Value

213.92350

1-sigma variation

0.18681

Unit

Perihelion distance

Value

0.944201

1-sigma variation

Unit

Aphelion distance

Value

2.912316

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.376537

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.013140

1-sigma variation

Unit

MOID

Value

0.001188

1-sigma variation

Unit

Orbit Period

Value

978.0168

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.74007E-7	4.65375E-8	8.34064E-8	-6.79313E-8	-1.81843E-7	-7.79273E-5
e	4.65375E-8	1.24463E-8	2.23067E-8	-1.81680E-8	-4.86344E-8	-2.08414E-5
i	8.34064E-8	2.23067E-8	3.99947E-8	-3.25512E-8	-8.71659E-8	-3.73528E-5
Ω	-6.79313E-8	-1.81680E-8	-3.25512E-8	2.65578E-8	7.09664E-8	3.04224E-5
ω	-1.81843E-7	-4.86344E-8	-8.71659E-8	7.09664E-8	1.90534E-7	8.14365E-5
M	-7.79273E-5	-2.08414E-5	-3.73528E-5	3.04224E-5	8.14365E-5	3.48990E-2

Date of computation: 2025-09-10 00:30 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

27.383

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

9 - 20*

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

1495

Unit

Source

[1]

Normalized RMS of residuals

Value

0.607352

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-09-12.343035

Unit

Source

[2]

Last Observation

Value

2021-10-01.428184

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

63 (1)

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 2021RL14 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	1958-06-11 07:52	> 1 mo	0.1100441	0.0207505	0.6475707
EARTH	1979-06-26 07:52	> 1 d	0.0210960	0.0203707	0.0082462
EARTH	2000-08-05 13:50	> 1 w	0.0708457	0.0615316	0.0032581
EARTH	2021-09-11 10:45	< 1 s	0.0046578	0.0046551	0.0000009
EARTH	2080-06-24 07:42	> 1 w	0.0265440	0.0213774	0.0394881
EARTH	2088-07-11 00:52	> 1 mo	0.0485531	0.0228833	0.0794437
EARTH	2096-08-12 22:36	> 1 mo	0.0671919	0.0194180	0.0276081
EARTH	2104-09-12 14:48	> 1 w	0.0009399	0.0000896	0.0476827
EARTH	2107-06-18 00:52	> 1 mo	0.1458753	0.0219540	76.3363176

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
20.32537548	246.25160234	0.00138944	MINIMUM
338.24796885	173.09055810	0.02111027	MINIMUM
358.85350242	208.94598642	0.06996536	SADDLE
179.72044998	30.15354706	1.92659116	SADDLE
359.17787192	29.50990461	1.93120513	SADDLE
179.72938431	210.15407465	3.92627322	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2021RL14

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2104-09-12.376	89784.376	0.498	1.27 ± 0.000	5.97E4	1.12E-5	4.40E-2	-6.41
2112-09-12.273	92706.273	-3.118	0.45 ± 0.000	8.16E3	1.11E-6	4.38E-2	-7.46
2115-09-13.361	93802.361	3.610	1.34 ± 0.000	4.90E4	3.39E-8	4.45E-2	-8.98
2115-09-13.567	93802.567	3.147	0.24 ± 0.001	1.92E5	4.47E-8	4.45E-2	-8.86
2118-09-13.104	94898.104	0.337	1.43 ± 0.000	3.12E6	1.27E-7	4.39E-2	-8.43


Based on 63 optical observations (of which 1 are rejected as outliers) from 2021/09/12.343 to 2021/10/01.428.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.53 and 1.53 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: