Asteroids

2020UR1 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.971

Aphelion (Q)

2.190

Eccentricity (e)

0.386

Inclination (i)

2.5

deg

Orbit period (P)

725.9

Earth MOID

0.03002

U parameter

7.0

Next Earth close approach

Date

2026-07-25

Nominal distance (from Earth center)

0.04799

7179188

Maximum Brightness

21.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.5

mag

Diameter

21 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-10-17

Observatory

Pan-STARRS 2, Haleakala

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.580782

1-sigma variation

0.000368

Unit

Eccentricity (e)

Value

0.385688

1-sigma variation

0.000152

Unit

Inclination (i)

Value

2.5263

1-sigma variation

0.0030

Unit

Long. of Ascending Node (Ω)

Value

231.5075

1-sigma variation

0.0260

Unit

Arg. of Perihelion (ω)

Value

109.0383

1-sigma variation

0.0324

Unit

Mean Anomaly (M)

Value

321.02193

1-sigma variation

0.37915

Unit

Perihelion distance

Value

0.971094

1-sigma variation

Unit

Aphelion distance

Value

2.190471

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.528281

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.205901

1-sigma variation

Unit

MOID

Value

0.030022

1-sigma variation

Unit

Orbit Period

Value

725.9497

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.35283E-7	5.57493E-8	1.10203E-6	9.55717E-6	-1.19348E-5	-1.39454E-4
e	5.57493E-8	2.29738E-8	4.54139E-7	3.93845E-6	-4.91824E-6	-5.74679E-5
i	1.10203E-6	4.54139E-7	8.97760E-6	7.78507E-5	-9.72186E-5	-1.13601E-3
Ω	9.55717E-6	3.93845E-6	7.78507E-5	6.75205E-4	-8.43176E-4	-9.85179E-3
ω	-1.19348E-5	-4.91824E-6	-9.72186E-5	-8.43176E-4	1.05294E-3	1.23027E-2
M	-1.39454E-4	-5.74679E-5	-1.13601E-3	-9.85179E-3	1.23027E-2	1.43753E-1

Date of computation: 2026-03-17 23:26 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

25.476

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

21 - 50*

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

2034

Unit

Source

[1]

Normalized RMS of residuals

Value

0.576426

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-10-04.22937

Unit

Source

[2]

Last Observation

Value

2020-11-08.216383

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

36 (1)

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

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2020UR1 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
MARS	1978-09-19 06:17	> 1 d	0.0225310	0.0032223	0.0555411
EARTH	2018-10-17 03:12	630.3	0.0975066	0.0839212	0.0045639
EARTH	2020-10-04 07:34	< 1 min	0.0310376	0.0310010	0.0000122
EARTH	2022-09-14 04:20	> 1 d	0.0503396	0.0461081	0.0014334
EARTH	2024-08-14 20:53	> 1 d	0.0524108	0.0475237	0.0019412
EARTH	2026-07-25 17:08	> 1 d	0.0479899	0.0434995	0.0047817
EARTH	2028-07-13 18:10	> 1 d	0.1139198	0.0634511	0.0182021
MARS	2089-09-09 17:37	> 1 d	0.0481598	0.0018549	0.0731183
EARTH	2125-10-24 08:27	> 1 d	0.1613155	0.0295411	0.0474813

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
19.70923719	269.50720063	0.03002192	MINIMUM
337.23869110	206.02748924	0.04342513	MINIMUM
356.27883666	234.51213663	0.05738642	SADDLE
179.02285197	58.23028859	1.20008383	SADDLE
357.93273393	57.00557809	1.96223342	SADDLE
179.09473736	238.27101107	3.19939153	MAXIMUM

Download:

MOID Plots

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