Asteroids

2021RL14

Last update: 2021-09-17 23:50 UTC

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.943

Aphelion (Q)

2.865

Eccentricity (e)

0.505

Inclination (i)

1.2

deg

Orbit period (P)

959.9

days

Earth MOID

0.00135

Next Earth close approach

Date

2080-06-28

Nominal distance (from Earth center)

0.0222

3320337

Maximum Brightness

22.9

Orbit Visualiser

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Risk

Object is in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

27.5

Diameter

11*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-09-13

Observatory

ATLAS-HKO, Haleakala

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

Value

1-sigma variation

Unit

Epoch

Value

59400.0

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.9

1-sigma variation

9.47239E-4

Unit

Eccentricity (e)

Value

0.50466996937865

1-sigma variation

2.58644E-4

Unit

Inclination (i)

Value

1.19

1-sigma variation

4.889E-4

Unit

Ascending Node (Ω)

Value

171.59

1-sigma variation

1.146E-4

Unit

Arg. of Perihelion (ω)

Value

140.46

1-sigma variation

5.562E-4

Unit

Mean Anomaly (M)

Value

345.15

1-sigma variation

0.010112

Unit

Perihelion

Value

9.433E-1

1-sigma variation

Unit

Aphelion

Value

2.87

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.33

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.562E-2

1-sigma variation

Unit

MOID

Value

1.353E-3

1-sigma variation

Unit

Orbit Period

Value

959.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.97262E-7	2.44998E-7	4.63104E-7	-1.08328E-7	-5.23513E-7	9.57845E-6
e	2.44998E-7	6.68967E-8	1.26450E-7	-2.95793E-8	-1.42954E-7	2.61540E-6
i	4.63104E-7	1.26450E-7	2.39056E-7	-5.58897E-8	-2.70077E-7	4.94369E-6
Ω	-1.08328E-7	-2.95793E-8	-5.58897E-8	1.31295E-8	6.32601E-8	-1.15645E-6
ω	-5.23513E-7	-1.42954E-7	-2.70077E-7	6.32601E-8	3.09364E-7	-5.58958E-6
M	9.57845E-6	2.61540E-6	4.94369E-6	-1.15645E-6	-5.58958E-6	1.02252E-4

Date of computation: 2021-09-17 13:41 UTC

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)

Taxononomy

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

27.496

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

11*

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

[-]

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

**Estimated value

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

days

Source

[1]

Unobserved

Value

Unit

days

Source

[1]

Astrometry Summary

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

Optical

Value

Unit

Source

RMS of Residuals

Value

0.574554

Unit

arcseconds

Source

[1]

First Observation

Value

2021-09-12.343035

Unit

Source

[2]

Last Observation

Value

2021-09-15.454824

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

61 (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

[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 2021RL14 from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
EARTH	1950-08-23.11233	33516.1	0.0548181	0.0026188	9.800E-1	4.785E-8	6.80E-2
EARTH	1979-06-24.06734	44048.1	0.0211972	0.0203927	7.783E-2	9.826E-8	8.52E-1
EARTH	2000-08-01.41699	51757.4	0.0713264	0.0679729	6.997E-3	2.607E-7	1.00E0
EARTH	2021-09-11.44856	59468.4	0.0046581	0.0046521	1.999E-6	6.620E-9	1.00E0
EARTH	2080-06-28.56815	80943.6	0.0221951	0.0213431	1.375E-1	9.830E-8	4.82E-1
EARTH	2088-08-27.18308	83925.2	0.0477499	0.0002687	6.109E-1	4.377E-8	1.09E-1
EARTH	2096-09-24.01181	86875.0	0.1010914	0.0002397	9.347E-1	4.497E-9	7.13E-2
EARTH	2147-06-21.97208	105407.0	0.0563963	0.0215549	3.146E0	1.058E-7	2.11E-2

Download as:

2021RL14

Date	MJD	σ	Distance ± Width (RE)	Stretching (RE/σ)	IP	Exp. Energy (MT)	PS
2091-09-12.070	85036.070	2.818	1.39 ± 0.003	2.94E6	3.45E-9	1.53E-10	-9.87
2099-09-11.893	87957.893	4.983	0.56 ± 0.000	1.25E5	3.71E-11	1.65E-12	-11.88
2104-09-12.374	89784.374	-0.073	1.21 ± 0.000	1.32E5	5.73E-6	2.51E-7	-6.73
2107-09-12.767	90879.767	-0.056	1.51 ± 0.000	1.90E7	2.89E-8	1.26E-9	-9.04
2109-09-12.885	91610.885	1.131	0.16 ± 0.219	3.44E7	1.84E-8	8.11E-10	-9.24
2110-09-13.691	91976.691	0.977	0.77 ± 0.000	1.50E7	5.01E-8	2.22E-9	-8.81
2112-09-12.272	92706.272	-1.684	0.42 ± 0.000	1.72E4	1.65E-5	7.18E-7	-6.31
2113-09-13.181	93072.181	0.976	1.48 ± 0.032	2.42E7	6.57E-9	2.91E-10	-9.71
2115-09-13.360	93802.360	0.064	1.42 ± 0.011	2.91E7	3.03E-8	1.33E-9	-9.05
2115-09-13.362	93802.362	1.313	1.11 ± 0.000	1.11E5	4.28E-6	1.89E-7	-6.90
2115-09-13.463	93802.463	-0.193	0.14 ± 0.000	2.74E6	4.33E-7	1.90E-8	-7.90
2115-09-13.568	93802.568	1.107	0.22 ± 0.000	6.56E5	9.93E-7	4.38E-8	-7.54
2116-09-12.446	94167.446	1.165	1.49 ± 0.089	1.24E8	1.02E-9	4.46E-11	-10.53
2117-09-12.561	94532.561	1.255	0.73 ± 0.000	8.17E7	5.95E-9	2.62E-10	-9.77
2117-09-12.704	94532.704	1.162	0.56 ± 0.000	9.55E6	6.05E-8	2.66E-9	-8.76
2118-09-13.093	94898.093	-0.185	0.82 ± 0.000	5.49E6	2.02E-7	8.86E-9	-8.24
2118-09-13.105	94898.105	-0.145	1.43 ± 0.008	7.05E6	5.86E-8	2.57E-9	-8.78


Based on 61 optical observations (of which 1 are rejected as outliers) from 2021/09/12.343 to 2021/09/15.455.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.52 and 1.53 Earth radii. Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 2.0, Date of computation=20210917 152959.615 UTC.

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