Asteroids

2018TL3 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

1.010

Aphelion (Q)

1.404

Eccentricity (e)

0.163

Inclination (i)

35.4

deg

Orbit period (P)

484.5

Earth MOID

0.10387

U parameter

8.4

Next Earth close approach

Date

2075-10-10

Nominal distance (from Earth center)

0.16852

25210738

Maximum Brightness

22.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.3

mag

Diameter

40 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-10-06

Observatory

Mt. Lemmon 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

1.207186

1-sigma variation

0.001535

Unit

Eccentricity (e)

Value

0.162959

1-sigma variation

0.000672

Unit

Inclination (i)

Value

35.4481

1-sigma variation

0.0672

Unit

Long. of Ascending Node (Ω)

Value

12.7517

1-sigma variation

0.0034

Unit

Arg. of Perihelion (ω)

Value

67.7215

1-sigma variation

0.2431

Unit

Mean Anomaly (M)

Value

81.34882

1-sigma variation

3.37981

Unit

Perihelion distance

Value

1.010464

1-sigma variation

Unit

Aphelion distance

Value

1.403907

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.106640

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.251512

1-sigma variation

Unit

MOID

Value

0.103871

1-sigma variation

Unit

Orbit Period

Value

484.4618

1-sigma variation

Unit

U parameter

Value

8.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.35517E-6	1.02999E-6	1.03014E-4	-5.20778E-6	-3.72832E-4	-5.18685E-3
e	1.02999E-6	4.52003E-7	4.49447E-5	-2.27303E-6	-1.62732E-4	-2.26851E-3
i	1.03014E-4	4.49447E-5	4.51345E-3	-2.28108E-4	-1.63294E-2	-2.26862E-1
Ω	-5.20778E-6	-2.27303E-6	-2.28108E-4	1.15291E-5	8.25331E-4	1.14689E-2
ω	-3.72832E-4	-1.62732E-4	-1.63294E-2	8.25331E-4	5.90871E-2	8.21071E-1
M	-5.18685E-3	-2.26851E-3	-2.26862E-1	1.14689E-2	8.21071E-1	1.14231E1

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

24.292

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

40 - 80*

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

2587

Unit

Source

[1]

Normalized RMS of residuals

Value

0.404395

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-10-06.26665

Unit

Source

[2]

Last Observation

Value

2018-10-09.00645

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

41 (0)

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 2018TL3 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	1957-10-08 15:22	> 1 w	0.1262646	0.1047670	0.3335846
EARTH	1961-10-06 20:03	> 1 w	0.1149390	0.1042462	0.2305410
EARTH	2014-10-10 02:05	563.1	0.1933074	0.1122832	0.0364589
EARTH	2018-10-08 15:58	1.3	0.1114945	0.1108310	0.0002212
EARTH	2022-10-06 16:58	1172.5	0.1314514	0.1050227	0.0268108
EARTH	2075-10-10 05:18	> 1 d	0.1685234	0.1065454	0.4345819
EARTH	2079-10-08 16:24	> 1 w	0.1046710	0.1040716	0.0610324
EARTH	2083-10-06 14:47	> 1 w	0.1513232	0.1049374	0.4666746

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
302.74036904	273.16584766	0.10437814	MINIMUM
96.89140480	84.73388064	0.24235961	MINIMUM
20.53485902	2.71284579	0.61175778	SADDLE
200.82627498	174.86316713	0.81299853	SADDLE
11.13435926	169.52337616	1.93657461	SADDLE
148.33651263	304.91518249	2.32194715	MAXIMUM

Download:

MOID Plots

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