Asteroids

2018QT1 help

Last update: 2025-08-25 14:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.267

Aphelion (Q)

1.051

Eccentricity (e)

0.595

Inclination (i)

7.9

deg

Orbit period (P)

195.3

Earth MOID

0.03323

U parameter

1.8

Next Earth close approach

Date

2025-09-23

Nominal distance (from Earth center)

0.03364

5032082

Maximum Brightness

18.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.2

mag

Diameter

120

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-08-28

Observatory

WISE

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

0.658676

1-sigma variation

1.522E-8

Unit

Eccentricity (e)

Value

0.595211

1-sigma variation

3.376E-7

Unit

Inclination (i)

Value

7.9359

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

193.9113

1-sigma variation

0.0006

Unit

Arg. of Perihelion (ω)

Value

330.6393

1-sigma variation

0.0006

Unit

Mean Anomaly (M)

Value

335.37901

1-sigma variation

0.00015

Unit

Perihelion distance

Value

0.266625

1-sigma variation

Unit

Aphelion distance

Value

1.050727

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.721287

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.116049

1-sigma variation

Unit

MOID

Value

0.033228

1-sigma variation

Unit

Orbit Period

Value

195.2567

1-sigma variation

Unit

U parameter

Value

1.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.31606E-16	-2.91517E-15	-7.79131E-13	2.80726E-12	-2.73260E-12	-1.78241E-12
e	-2.91517E-15	1.13977E-13	2.32862E-11	-8.77438E-11	9.17836E-11	4.30771E-12
i	-7.79131E-13	2.32862E-11	1.98981E-8	-8.83617E-8	8.50487E-8	1.08373E-8
Ω	2.80726E-12	-8.77438E-11	-8.83617E-8	3.97856E-7	-3.82480E-7	-4.56205E-8
ω	-2.73260E-12	9.17836E-11	8.50487E-8	-3.82480E-7	3.68704E-7	4.12732E-8
M	-1.78241E-12	4.30771E-12	1.08373E-8	-4.56205E-8	4.12732E-8	2.34168E-8

Date of computation: 2025-08-25 14:30 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

22.191

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.143

Unit

Source

[2]

Diameter

Value

120

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]	EARN	1.) Joseph R. Masiero et al 2020 Planet. Sci. J. 1 5

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

2553

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.491524

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-08-28.213507

Unit

Source

[2]

Last Observation

Value

2025-08-24.462511

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

128 (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 2018QT1 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
VENUS	1953-08-09 13:37	< 1 min	0.0376197	0.0375636	0.0000187
EARTH	1956-09-24 14:01	< 1 min	0.0376935	0.0376797	0.0000046
EARTH	1957-08-22 02:49	< 1 min	0.1145177	0.1144965	0.0000071
EARTH	1964-09-12 07:09	3.5	0.0749532	0.0749366	0.0000055
EARTH	1971-09-26 19:15	< 1 min	0.0914420	0.0913934	0.0000162
EARTH	1972-08-26 06:18	2.2	0.0927604	0.0927547	0.0000019
EARTH	1979-09-21 08:50	1.8	0.0458709	0.0458516	0.0000064
EARTH	1980-08-21 04:20	< 1 min	0.1543133	0.1542838	0.0000098
EARTH	1986-09-25 16:08	< 1 min	0.1618107	0.1617890	0.0000072
EARTH	1987-09-04 00:48	1.2	0.0874478	0.0874469	0.0000003
EARTH	1994-09-25 13:50	< 1 min	0.0402634	0.0402584	0.0000016
VENUS	1994-10-27 13:20	< 1 min	0.0140570	0.0140468	0.0000034
EARTH	1995-08-23 11:03	< 1 min	0.1095507	0.1095466	0.0000014
EARTH	2002-09-19 02:58	< 1 min	0.0549221	0.0549193	0.0000009
EARTH	2003-08-22 07:13	< 1 min	0.1673963	0.1673913	0.0000017
EARTH	2009-09-25 04:03	< 1 min	0.1782365	0.1782308	0.0000019
EARTH	2010-09-06 19:23	< 1 min	0.0845476	0.0845465	0.0000004
EARTH	2017-09-26 12:53	< 1 min	0.0834855	0.0834824	0.0000010
EARTH	2018-08-26 20:21	< 1 min	0.0935297	0.0935280	0.0000006
EARTH	2025-09-23 17:39	< 1 min	0.0336374	0.0336349	0.0000008
EARTH	2026-08-22 10:42	< 1 min	0.1285718	0.1285698	0.0000007
VENUS	2027-06-06 10:17	< 1 min	0.0263960	0.0263914	0.0000015
EARTH	2033-09-12 04:21	< 1 min	0.0759370	0.0759359	0.0000004
VENUS	2039-09-25 09:12	< 1 min	0.0229384	0.0229327	0.0000019
EARTH	2040-09-26 08:59	< 1 min	0.1002610	0.1002575	0.0000012
EARTH	2041-08-27 19:34	< 1 min	0.0922510	0.0922497	0.0000004
EARTH	2048-09-21 17:18	< 1 min	0.0410825	0.0410805	0.0000007
EARTH	2049-08-21 22:02	< 1 min	0.1499540	0.1499503	0.0000012
EARTH	2055-09-26 06:51	< 1 min	0.1614732	0.1614655	0.0000026
EARTH	2056-09-03 11:16	< 1 min	0.0875585	0.0875573	0.0000004
EARTH	2063-09-25 18:06	< 1 min	0.0348824	0.0348774	0.0000017
EARTH	2064-08-22 12:13	< 1 min	0.1184689	0.1184621	0.0000023
VENUS	2068-08-23 03:22	< 1 min	0.0328754	0.0328554	0.0000067
EARTH	2071-09-12 17:28	< 1 min	0.0759674	0.0759639	0.0000012
EARTH	2078-09-27 02:09	< 1 min	0.0925275	0.0925211	0.0000021
EARTH	2079-08-27 23:20	< 1 min	0.0932902	0.0932884	0.0000006
VENUS	2080-12-12 14:31	< 1 min	0.0130441	0.0130375	0.0000022
EARTH	2086-09-24 20:24	< 1 min	0.0318448	0.0318422	0.0000009
EARTH	2087-08-23 09:55	< 1 min	0.1234198	0.1234080	0.0000039
EARTH	2094-09-17 12:37	3.0	0.0615987	0.0615762	0.0000075
EARTH	2095-08-23 04:56	< 1 min	0.1833140	0.1832667	0.0000158
VENUS	2101-04-03 16:32	< 1 min	0.0452701	0.0451700	0.0000334
EARTH	2101-09-26 21:24	< 1 min	0.1683886	0.1683129	0.0000252
EARTH	2102-09-07 00:53	4.6	0.0854481	0.0854390	0.0000030
EARTH	2109-09-27 22:35	< 1 min	0.0740934	0.0740361	0.0000191
EARTH	2110-08-27 17:12	2.2	0.0961758	0.0961633	0.0000042
VENUS	2113-07-22 21:20	< 1 min	0.0059693	0.0058914	0.0000260
EARTH	2117-09-27 04:50	9.0	0.0432667	0.0429052	0.0001210
EARTH	2118-08-26 06:49	18.6	0.1036724	0.1034125	0.0000870
VENUS	2121-07-22 02:16	14.8	0.0015929	0.0014946	0.0001759
EARTH	2125-09-28 00:23	563.6	0.1123798	0.0236292	0.0465478

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
211.80336170	260.68795641	0.03322790	MINIMUM
3.89819578	67.74472833	0.72758925	SADDLE
4.27504289	248.42646047	1.27405900	SADDLE
181.44367546	65.05200946	2.04279983	MAXIMUM

Download:

MOID Plots

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