Asteroids

2021OO1 help

Last update: 2024-04-16 14:31 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.923

Aphelion (Q)

1.167

Eccentricity (e)

0.117

Inclination (i)

39.6

deg

Orbit period (P)

390.1

Earth MOID

0.02406

U parameter

7.5

Next Earth close approach

Date

2037-08-04

Nominal distance (from Earth center)

0.11125

16642817

Maximum Brightness

22.1

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

24.3

mag

Diameter

40 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-07-31

Observatory

Palomar Mountain--ZTF

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.044897

1-sigma variation

0.000316

Unit

Eccentricity (e)

Value

0.116856

1-sigma variation

0.000064

Unit

Inclination (i)

Value

39.5750

1-sigma variation

0.0217

Unit

Long. of Ascending Node (Ω)

Value

308.6306

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

94.0659

1-sigma variation

0.1389

Unit

Mean Anomaly (M)

Value

98.06237

1-sigma variation

0.26531

Unit

Perihelion distance

Value

0.922795

1-sigma variation

Unit

Aphelion distance

Value

1.167000

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.024440

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.037751

1-sigma variation

Unit

MOID

Value

0.024059

1-sigma variation

Unit

Orbit Period

Value

390.1297

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.97039E-8	2.00799E-8	6.85214E-6	1.48168E-7	-4.38606E-5	-8.37734E-5
e	2.00799E-8	4.04701E-9	1.38013E-6	2.98428E-8	-8.83296E-6	-1.68715E-5
i	6.85214E-6	1.38013E-6	4.70933E-4	1.01832E-5	-3.01429E-3	-5.75732E-3
Ω	1.48168E-7	2.98428E-8	1.01832E-5	2.20199E-7	-6.51798E-5	-1.24494E-4
ω	-4.38606E-5	-8.83296E-6	-3.01429E-3	-6.51798E-5	1.92947E-2	3.68526E-2
M	-8.37734E-5	-1.68715E-5	-5.75732E-3	-1.24494E-4	3.68526E-2	7.03882E-2

Date of computation: 2024-02-21 14:29 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

24.282

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

40 - 80*

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 ODIM	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

986

Unit

Source

[1]

Normalized RMS of residuals

Value

0.681869

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-07-31.358773

Unit

Source

[2]

Last Observation

Value

2021-08-04.87996

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

120 (6)

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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2021OO1 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1959-08-06 06:42	> 1 d	0.1831213	0.0254300	0.0847576
EARTH	1960-01-27 08:58	> 1 d	0.0682116	0.0386197	0.0751745
EARTH	1974-07-30 14:09	> 1 d	0.0638234	0.0236099	0.1600413
EARTH	1976-01-31 06:28	> 1 d	0.1052527	0.0373516	0.1652333
EARTH	1990-08-03 12:54	> 1 d	0.0825696	0.0244717	0.1369907
EARTH	1991-01-24 23:18	> 1 d	0.1664367	0.0393500	0.1400129
EARTH	2005-07-27 09:57	> 1 d	0.1617113	0.0252247	0.0482383
EARTH	2007-01-28 14:41	1400.2	0.0373508	0.0372751	0.0024890
EARTH	2021-07-31 22:42	< 1 s	0.0258955	0.0258497	0.0000153
EARTH	2023-02-01 12:51	111.4	0.1517228	0.1405376	0.0037302
EARTH	2037-08-04 05:53	> 1 d	0.1112504	0.0243637	0.0409737
EARTH	2038-01-25 12:23	1304.3	0.1380312	0.0398511	0.0417376
EARTH	2052-07-27 07:28	> 1 d	0.1627402	0.0234733	0.0650660
EARTH	2054-01-28 10:57	> 1 d	0.0374007	0.0368993	0.0111951
EARTH	2068-07-30 16:56	> 1 d	0.0557089	0.0240229	0.1624289
EARTH	2070-01-31 07:21	> 1 d	0.1094100	0.0376450	0.1736794
EARTH	2084-08-02 06:01	> 1 d	0.0441857	0.0236395	0.1407712
EARTH	2100-08-06 18:30	1117.3	0.1713950	0.0703727	0.0341009
EARTH	2101-01-27 21:37	1067.0	0.0794991	0.0320425	0.0304305
EARTH	2115-07-30 20:26	> 1 d	0.1121348	0.0229788	0.1008367
EARTH	2117-01-30 17:26	> 1 d	0.0581924	0.0362221	0.0906080

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