Asteroids

2018QT1 help

Last update: 2025-07-22 00:00 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.267

Aphelion (Q)

1.051

Eccentricity (e)

0.595

Inclination (i)

7.9

deg

Orbit period (P)

195.2

Earth MOID

0.03294

U parameter

7.5

Next Earth close approach

Date

2025-09-23

Nominal distance (from Earth center)

0.03335

4989404

Maximum Brightness

18.6

mag

Risk

Object is not in risk list

Object is not in priority 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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.658656

1-sigma variation

0.000066

Unit

Eccentricity (e)

Value

0.595371

1-sigma variation

0.000203

Unit

Inclination (i)

Value

7.9037

1-sigma variation

0.0054

Unit

Long. of Ascending Node (Ω)

Value

193.9798

1-sigma variation

0.0120

Unit

Arg. of Perihelion (ω)

Value

330.5757

1-sigma variation

0.0100

Unit

Mean Anomaly (M)

Value

326.95201

1-sigma variation

0.67249

Unit

Perihelion distance

Value

0.266511

1-sigma variation

Unit

Aphelion distance

Value

1.050800

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.720215

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.116049

1-sigma variation

Unit

MOID

Value

0.032938

1-sigma variation

Unit

Orbit Period

Value

195.2477

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.31305E-9	-1.33308E-8	-3.52298E-7	7.86995E-7	-6.55468E-7	-4.41648E-5
e	-1.33308E-8	4.12030E-8	1.08892E-6	-2.43258E-6	2.02606E-6	1.36505E-4
i	-3.52298E-7	1.08892E-6	2.88005E-5	-6.43912E-5	5.36447E-5	3.60745E-3
Ω	7.86995E-7	-2.43258E-6	-6.43912E-5	1.44089E-4	-1.20075E-4	-8.05866E-3
ω	-6.55468E-7	2.02606E-6	5.36447E-5	-1.20075E-4	1.00073E-4	6.71185E-3
M	-4.41648E-5	1.36505E-4	3.60745E-3	-8.05866E-3	6.71185E-3	4.52239E-1

Date of computation: 2025-07-22 00:00 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

22.194

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

Unit

Source

[1]

Unobserved

Value

2489

Unit

Source

[1]

Normalized RMS of residuals

Value

0.472501

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

2018-09-29.16139

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

121 (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
EARTH	1950-08-21 10:57	84.6	0.1638506	0.1060739	0.0217309
EARTH	1956-09-25 13:25	> 1 d	0.1339733	0.0307021	0.0872337
EARTH	1957-08-30 15:03	> 1 w	0.0892244	0.0879791	0.0073426
EARTH	1964-09-22 08:22	> 1 w	0.0374286	0.0333297	0.0505696
EARTH	1965-08-21 06:42	> 1 d	0.1393784	0.0952136	0.1147275
EARTH	1971-09-25 16:31	> 1 d	0.1687439	0.0285375	0.2013884
EARTH	1972-09-03 17:30	> 1 w	0.0869569	0.0823069	0.0204871
VENUS	1978-03-19 10:51	> 1 d	0.0291060	0.0039462	0.2868145
EARTH	1979-09-25 00:30	> 1 w	0.0344929	0.0336115	0.0321067
EARTH	1980-08-21 13:24	> 1 d	0.1213975	0.0946838	0.0956587
EARTH	1986-09-24 22:58	> 1 d	0.1899536	0.0279161	0.0988440
EARTH	1987-09-07 01:57	> 1 w	0.0848648	0.0729583	0.0120986
EARTH	1994-09-25 08:33	725.8	0.0375007	0.0308324	0.0060472
VENUS	1994-10-27 17:13	485.9	0.0068482	0.0032814	0.0144218
EARTH	1995-08-23 06:11	568.3	0.1119459	0.0991278	0.0053065
EARTH	2002-09-18 14:51	> 1 d	0.0569965	0.0441992	0.0044543
EARTH	2003-08-22 08:01	107.2	0.1708873	0.1488985	0.0076151
EARTH	2009-09-25 05:52	232.3	0.1750489	0.1542727	0.0069366
EARTH	2010-09-06 10:44	1117.1	0.0849495	0.0824961	0.0008532
EARTH	2017-09-26 12:46	15.3	0.0830894	0.0805111	0.0008616
EARTH	2018-08-26 20:21	< 1 min	0.0935494	0.0934193	0.0000434
EARTH	2025-09-23 21:08	444.8	0.0333521	0.0330402	0.0005185
EARTH	2026-08-22 12:01	171.6	0.1268624	0.1165339	0.0036860
VENUS	2027-06-06 08:35	229.0	0.0221721	0.0019425	0.0092090
EARTH	2033-09-12 13:38	972.7	0.0751331	0.0709080	0.0014097
VENUS	2039-09-25 07:46	120.1	0.0195588	0.0067609	0.0042960
EARTH	2040-09-26 08:40	28.3	0.1019533	0.0966956	0.0017567
EARTH	2041-08-27 22:12	93.6	0.0921799	0.0920999	0.0000382
EARTH	2048-09-21 11:03	869.1	0.0424140	0.0345947	0.0031073
EARTH	2049-08-21 21:25	62.8	0.1524544	0.1363040	0.0056167
EARTH	2055-09-26 10:24	411.6	0.1544030	0.1118628	0.0142626
EARTH	2056-09-02 13:06	> 1 d	0.0882694	0.0856538	0.0013396
EARTH	2063-09-25 07:02	1362.2	0.0326201	0.0321146	0.0025443
EARTH	2064-08-22 05:37	646.6	0.1240249	0.0993112	0.0110579
VENUS	2068-08-23 13:40	1126.8	0.0145404	0.0004311	0.0354672
EARTH	2071-09-11 20:46	> 1 d	0.0776514	0.0690882	0.0028556
EARTH	2078-09-27 01:22	613.5	0.1008666	0.0280793	0.0790884
EARTH	2079-08-29 00:14	> 1 w	0.0919638	0.0902340	0.0103107
VENUS	2080-12-12 04:01	> 1 d	0.0314375	0.0000129	0.1434885
EARTH	2086-09-25 03:58	> 1 d	0.0323848	0.0317620	0.0145752
EARTH	2087-08-23 12:15	> 1 d	0.1206400	0.0956671	0.0528426
EARTH	2094-09-17 08:34	> 1 w	0.0622785	0.0183966	0.0498497
EARTH	2095-08-23 04:53	> 1 d	0.1851092	0.1000852	0.1027169
EARTH	2101-09-27 01:30	> 1 d	0.1606190	0.0249101	0.1224534
EARTH	2102-09-05 23:31	> 1 w	0.0865312	0.0819596	0.0125421
EARTH	2109-09-27 19:21	> 1 d	0.0640171	0.0293789	0.0659688
EARTH	2110-08-26 20:43	> 1 d	0.0990242	0.0928950	0.0192372
VENUS	2113-07-23 05:26	> 1 d	0.0119928	0.0011760	0.0754335
EARTH	2117-09-21 07:32	> 1 w	0.0496841	0.0279877	0.0610626
EARTH	2118-08-23 17:40	90.4	0.1673328	0.0995563	0.1262932
EARTH	2124-09-27 06:38	> 1 w	0.1423548	0.0250127	0.4119186
EARTH	2125-09-02 22:11	> 1 mo	0.0888925	0.0870407	0.0375442

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
211.97423923	259.79147273	0.03293764	MINIMUM
3.58850732	66.43334216	0.72696660	SADDLE
3.96603542	247.11971979	1.27296257	SADDLE
181.36756557	64.03286155	2.04218840	MAXIMUM

Download:

MOID Plots

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