Asteroids

2021TO14 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.664

Aphelion (Q)

2.273

Eccentricity (e)

0.548

Inclination (i)

1.5

deg

Orbit period (P)

650.1

Earth MOID

0.01542

U parameter

7.9

Next Earth close approach

Date

2037-10-28

Nominal distance (from Earth center)

0.11739

17561678

Maximum Brightness

23.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.9

mag

Diameter

27 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-10-14

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

1.468725

1-sigma variation

0.001011

Unit

Eccentricity (e)

Value

0.547793

1-sigma variation

0.000425

Unit

Inclination (i)

Value

1.4600

1-sigma variation

0.0008

Unit

Long. of Ascending Node (Ω)

Value

242.9582

1-sigma variation

0.0105

Unit

Arg. of Perihelion (ω)

Value

229.3150

1-sigma variation

0.0109

Unit

Mean Anomaly (M)

Value

78.81942

1-sigma variation

0.81782

Unit

Perihelion distance

Value

0.664168

1-sigma variation

Unit

Aphelion distance

Value

2.273282

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.586802

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.230129

1-sigma variation

Unit

MOID

Value

0.015416

1-sigma variation

Unit

Orbit Period

Value

650.1435

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.02133E-6	4.29819E-7	8.25077E-7	1.02782E-5	-1.07107E-5	-8.26500E-4
e	4.29819E-7	1.80887E-7	3.47281E-7	4.32369E-6	-4.50554E-6	-3.47826E-4
i	8.25077E-7	3.47281E-7	6.72066E-7	8.11160E-6	-8.45241E-6	-6.67684E-4
Ω	1.02782E-5	4.32369E-6	8.11160E-6	1.10082E-4	-1.14723E-4	-8.31753E-3
ω	-1.07107E-5	-4.50554E-6	-8.45241E-6	-1.14723E-4	1.19573E-4	8.66750E-3
M	-8.26500E-4	-3.47826E-4	-6.67684E-4	-8.31753E-3	8.66750E-3	6.68835E-1

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

24.935

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

27 - 60*

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

1436

Unit

Source

[1]

Normalized RMS of residuals

Value

0.644112

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-10-14.304394

Unit

Source

[2]

Last Observation

Value

2021-10-17.882862

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

78 (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 2021TO14 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	1965-04-08 15:41	> 1 mo	0.0223615	0.0181855	47.1683191
VENUS	1972-02-20 06:00	> 1 mo	0.0114003	0.0005333	5.2033639
EARTH	1973-10-26 21:52	> 1 mo	0.1085211	0.0167998	5.4233263
EARTH	1988-04-11 23:33	> 1 mo	0.0512669	0.0178657	4.6310887
EARTH	1989-10-08 11:11	> 1 mo	0.1897904	0.0165905	4.3661820
VENUS	2002-04-13 05:59	> 1 w	0.0086733	0.0001880	0.0889241
EARTH	2004-04-01 19:15	> 1 w	0.0978295	0.0175132	0.0877204
EARTH	2020-04-19 03:16	835.4	0.1802845	0.1443529	0.0119916
EARTH	2021-10-18 21:22	< 1 s	0.0162910	0.0162529	0.0000127
EARTH	2037-10-28 11:29	> 1 w	0.1173926	0.0161534	0.0930176
MARS	2059-08-21 21:54	> 1 d	0.0268113	0.0059656	0.0465795
EARTH	2061-04-01 02:46	> 1 d	0.1135779	0.0171514	0.0480715
EARTH	2077-04-12 09:22	> 1 d	0.0453540	0.0171710	0.0805153
EARTH	2078-10-11 17:30	> 1 d	0.1462205	0.0153501	0.0800440
MARS	2093-06-27 19:50	523.3	0.0334098	0.0076562	0.0113291
EARTH	2094-10-25 12:51	> 1 d	0.0768446	0.0151132	0.0318791
EARTH	2118-04-07 01:06	> 1 w	0.0659393	0.0167534	0.2632728
VENUS	2121-08-24 18:05	> 1 mo	0.0347184	0.0013114	0.1994426

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
306.04833283	284.39402651	0.01539156	MINIMUM
54.57335053	96.43898426	0.01755019	MINIMUM
0.47762314	10.65162447	0.32017607	SADDLE
180.13540636	190.17145009	1.25737957	SADDLE
0.41668135	190.53342637	1.68007720	SADDLE
180.10057635	10.15013871	3.25685406	MAXIMUM

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MOID Plots

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