Asteroids

533671 2014LJ21 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.302

Aphelion (Q)

5.478

Eccentricity (e)

0.896

Inclination (i)

24.3

deg

Orbit period (P)

1794.5

Earth MOID

0.02644

U parameter

0.0

Next Earth close approach

Date

2048-07-30

Nominal distance (from Earth center)

0.06778

10139634

Maximum Brightness

13.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

15.9

mag

Diameter

1700 - 4000*

Taxonomic type

Rotation period (T)

16.41

Discovery Information

Discovery Date

2014-06-05

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.890028

1-sigma variation

1.173E-8

Unit

Eccentricity (e)

Value

0.895523

1-sigma variation

4.425E-8

Unit

Inclination (i)

Value

24.2828

1-sigma variation

5.616E-6

Unit

Long. of Ascending Node (Ω)

Value

126.5390

1-sigma variation

4.110E-5

Unit

Arg. of Perihelion (ω)

Value

302.9488

1-sigma variation

3.870E-5

Unit

Mean Anomaly (M)

Value

131.56261

1-sigma variation

3.659E-6

Unit

Perihelion distance

Value

0.301940

1-sigma variation

Unit

Aphelion distance

Value

5.478115

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.600284

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.099506

1-sigma variation

Unit

MOID

Value

0.026438

1-sigma variation

Unit

Orbit Period

Value

1794.5331

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.37505E-16	2.45355E-18	-2.08171E-14	1.13893E-13	-7.30668E-14	-3.36348E-14
e	2.45355E-18	1.95826E-15	-8.98426E-15	1.89061E-13	-5.81582E-13	-6.76700E-14
i	-2.08171E-14	-8.98426E-15	3.15432E-11	7.48421E-11	-7.87363E-11	8.49308E-12
Ω	1.13893E-13	1.89061E-13	7.48421E-11	1.68923E-9	-1.52561E-9	-4.49651E-11
ω	-7.30668E-14	-5.81582E-13	-7.87363E-11	-1.52561E-9	1.49758E-9	4.14514E-11
M	-3.36348E-14	-6.76700E-14	8.49308E-12	-4.49651E-11	4.14514E-11	1.33858E-11

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

16.41

Unit

Source

[1]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

171

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[2]

Taxonomy (all)

Value

Unit

Source

[3]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

15.928

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[5]

Diameter

Value

1700 - 4000*

Unit

Source

[5]

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]	EARN	1.) Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2019 March-July, B.D. Warner
[2]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	ESA Aegis	ESA orbit determination and impact monitoring system
[5]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

6977

Unit

Source

[1]

Unobserved

Value

465

Unit

Source

[1]

Normalized RMS of residuals

Value

0.468968

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2005-05-12.347669

Unit

Source

[2]

Last Observation

Value

2024-06-18.198079

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

625 (8)

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 533671 2014LJ21 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	1989-08-01 08:59	< 1 min	0.0180579	0.0180537	0.0000014
EARTH	2048-07-30 02:01	< 1 min	0.0677793	0.0677766	0.0000009

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
316.20604030	207.93530835	0.02653091	MINIMUM
38.63327849	76.01058144	0.34385068	MINIMUM
356.25200297	315.23203110	0.71626918	SADDLE
357.42569182	140.36832009	1.29884724	SADDLE
179.43566221	149.48569153	4.53958358	SADDLE
180.31872899	329.70338257	6.41206021	MAXIMUM

Download:

MOID Plots

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