Asteroids

2021PN5 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.033

Aphelion (Q)

1.675

Eccentricity (e)

0.237

Inclination (i)

6.3

deg

Orbit period (P)

575.2

Earth MOID

0.07197

U parameter

6.9

Next Earth close approach

Date

2032-10-23

Nominal distance (from Earth center)

0.17051

25508541

Maximum Brightness

24.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.3

mag

Diameter

23 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-08-09

Observatory

Pan-STARRS 1, 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.353560

1-sigma variation

0.000205

Unit

Eccentricity (e)

Value

0.237114

1-sigma variation

0.000105

Unit

Inclination (i)

Value

6.3051

1-sigma variation

0.0025

Unit

Long. of Ascending Node (Ω)

Value

141.4030

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

235.9298

1-sigma variation

0.0026

Unit

Mean Anomaly (M)

Value

220.75025

1-sigma variation

0.21306

Unit

Perihelion distance

Value

1.032612

1-sigma variation

Unit

Aphelion distance

Value

1.674508

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.485571

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.113745

1-sigma variation

Unit

MOID

Value

0.071970

1-sigma variation

Unit

Orbit Period

Value

575.1946

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.22240E-8	2.15665E-8	5.09035E-7	5.46476E-8	-5.25673E-7	-4.37811E-5
e	2.15665E-8	1.10154E-8	2.59994E-7	2.79133E-8	-2.68475E-7	-2.23618E-5
i	5.09035E-7	2.59994E-7	6.13726E-6	6.58659E-7	-6.33831E-6	-5.27806E-4
Ω	5.46476E-8	2.79133E-8	6.58659E-7	7.10160E-8	-6.79934E-7	-5.66633E-5
ω	-5.25673E-7	-2.68475E-7	-6.33831E-6	-6.79934E-7	6.55538E-6	5.45051E-4
M	-4.37811E-5	-2.23618E-5	-5.27806E-4	-5.66633E-5	5.45051E-4	4.53956E-2

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

25.33

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

23 - 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

[-]

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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

1457

Unit

Source

[1]

Normalized RMS of residuals

Value

0.453953

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-08-09.36311

Unit

Source

[2]

Last Observation

Value

2021-09-27.36589

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

26 (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 2021PN5 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	1958-09-06 16:41	> 1 d	0.0767137	0.0698847	0.0162710
EARTH	1969-09-19 01:12	> 1 d	0.1007680	0.0429450	0.0253968
EARTH	2010-08-30 20:24	1085.0	0.1556019	0.1145357	0.0141547
EARTH	2021-09-10 13:52	< 1 min	0.0732703	0.0731819	0.0000295
EARTH	2032-10-23 19:15	> 1 d	0.1705141	0.1344081	0.0126721
EARTH	2073-09-07 13:44	> 1 d	0.0772063	0.0719115	0.0136233
EARTH	2084-09-23 12:57	> 1 w	0.1108930	0.0233188	0.0587793
EARTH	2125-09-02 19:40	> 1 d	0.1386258	0.0642429	0.1166498

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
335.91354853	245.38283764	0.07272095	MINIMUM
179.69862987	94.15310435	0.68361770	SADDLE
356.95998530	91.98167524	2.03139834	SADDLE
177.20346638	272.18931435	2.67083645	MAXIMUM

Download:

MOID Plots

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