Asteroids

2018NX help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.766

Aphelion (Q)

1.029

Eccentricity (e)

0.146

Inclination (i)

4.1

deg

Orbit period (P)

310.8

Earth MOID

0.00173

U parameter

5.6

Next Earth close approach

Date

2035-06-28

Nominal distance (from Earth center)

0.126

18848732

Maximum Brightness

26.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.7

mag

Diameter

8 - 17*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-07-08

Observatory

Palomar Mountain--ZTF

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

0.897885

1-sigma variation

0.000010

Unit

Eccentricity (e)

Value

0.146436

1-sigma variation

0.000020

Unit

Inclination (i)

Value

4.0563

1-sigma variation

0.0007

Unit

Long. of Ascending Node (Ω)

Value

284.1446

1-sigma variation

0.0010

Unit

Arg. of Perihelion (ω)

Value

202.8020

1-sigma variation

0.0011

Unit

Mean Anomaly (M)

Value

29.55660

1-sigma variation

0.06730

Unit

Perihelion distance

Value

0.766403

1-sigma variation

Unit

Aphelion distance

Value

1.029367

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.002343

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.209462

1-sigma variation

Unit

MOID

Value

0.001727

1-sigma variation

Unit

Orbit Period

Value

310.7632

1-sigma variation

Unit

U parameter

Value

5.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.07649E-10	-2.06316E-10	-7.73741E-9	-1.02298E-8	1.17392E-8	-6.98299E-7
e	-2.06316E-10	3.95426E-10	1.48305E-8	1.96072E-8	-2.24940E-8	1.33833E-6
i	-7.73741E-9	1.48305E-8	5.56468E-7	7.35569E-7	-8.43018E-7	5.01899E-5
Ω	-1.02298E-8	1.96072E-8	7.35569E-7	9.72423E-7	-1.11494E-6	6.63579E-5
ω	1.17392E-8	-2.24940E-8	-8.43018E-7	-1.11494E-6	1.28368E-6	-7.61563E-5
M	-6.98299E-7	1.33833E-6	5.01899E-5	6.63579E-5	-7.61563E-5	4.52977E-3

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

27.656

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

8 - 17*

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

2626

Unit

Source

[1]

Normalized RMS of residuals

Value

0.604447

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-07-08.3477

Unit

Source

[2]

Last Observation

Value

2018-07-19.33299

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

32 (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

Close Approaches for 2018NX 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	1965-07-11 22:22	> 1 d	0.1746530	0.0013990	0.2894531
EARTH	1966-07-15 15:44	> 1 mo	0.0513300	0.0078611	0.3946001
EARTH	1967-01-13 21:37	> 1 mo	0.0733129	0.0620038	0.2005619
EARTH	1967-11-19 21:09	> 1 w	0.1681781	0.0659050	0.3883389
EARTH	1990-07-07 19:07	92.2	0.0236180	0.0014493	0.0098818
EARTH	1991-03-03 20:53	> 1 w	0.1140656	0.1067155	0.0029357
EARTH	1991-12-13 23:49	> 1 d	0.0537599	0.0458537	0.0054471
EARTH	2018-07-07 18:11	< 1 min	0.0007821	0.0007816	0.0000002
EARTH	2024-03-23 18:01	1213.6	0.1968286	0.1961542	0.0002250
EARTH	2024-09-02 19:59	9.8	0.1715452	0.1692856	0.0007539
EARTH	2035-06-28 14:50	23.8	0.1259960	0.1208034	0.0017311
EARTH	2035-12-03 14:26	> 1 d	0.1794412	0.1780516	0.0004694
EARTH	2041-08-21 09:50	620.6	0.0586369	0.0565801	0.0007072
EARTH	2058-08-14 11:56	767.4	0.0516552	0.0499111	0.0005998
EARTH	2069-06-28 06:46	50.5	0.0824176	0.0747851	0.0025444
EARTH	2069-11-20 12:20	> 1 d	0.1665238	0.1636543	0.0009738
EARTH	2075-03-25 00:07	1357.4	0.1987617	0.1982207	0.0001805
EARTH	2075-09-03 17:21	2.3	0.1749589	0.1725338	0.0008091
EARTH	2086-07-06 03:22	1006.8	0.0019892	0.0017621	0.0009281
EARTH	2091-06-28 00:47	> 1 w	0.1400989	0.0042398	1.1076124
EARTH	2107-04-06 15:24	> 1 mo	0.1970872	0.0346220	0.6971901
EARTH	2107-09-09 05:34	> 1 w	0.1235296	0.0416968	1.7029984
EARTH	2112-07-10 09:34	> 1 mo	0.0131090	0.0008307	0.5925350
EARTH	2117-06-30 00:20	> 1 mo	0.0172106	0.0008114	9.2784942
EARTH	2117-10-31 18:25	> 1 mo	0.1500520	0.0469100	5.8500024

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
154.00117844	182.23511307	0.00040671	MINIMUM
8.58152747	33.93027946	0.22104713	SADDLE
4.55678558	209.34220711	1.78074525	SADDLE
182.39871186	27.15351701	2.01434987	MAXIMUM

Download:

MOID Plots

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