Asteroids

2021RO16 help

Last update: 2024-04-24 07:27 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.873

Aphelion (Q)

1.499

Eccentricity (e)

0.264

Inclination (i)

0.4

deg

Orbit period (P)

471.8

Earth MOID

0.00347

U parameter

7.1

Next Earth close approach

Date

2034-04-23

Nominal distance (from Earth center)

0.01464

2190523

Maximum Brightness

21.2

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.5

mag

Diameter

13 - 29*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-09-14

Observatory

ATLAS-MLO, Mauna Loa

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

1.186023

1-sigma variation

0.000214

Unit

Eccentricity (e)

Value

0.263976

1-sigma variation

0.000201

Unit

Inclination (i)

Value

0.4143

1-sigma variation

0.0003

Unit

Long. of Ascending Node (Ω)

Value

60.0803

1-sigma variation

0.0089

Unit

Arg. of Perihelion (ω)

Value

219.3182

1-sigma variation

0.0091

Unit

Mean Anomaly (M)

Value

33.73633

1-sigma variation

0.21230

Unit

Perihelion distance

Value

0.872941

1-sigma variation

Unit

Aphelion distance

Value

1.499106

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.396913

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.094684

1-sigma variation

Unit

MOID

Value

0.003471

1-sigma variation

Unit

Orbit Period

Value

471.7787

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.57452E-8	4.30052E-8	6.55158E-8	-1.84413E-6	1.87876E-6	-4.54077E-5
e	4.30052E-8	4.04302E-8	6.15795E-8	-1.73178E-6	1.76419E-6	-4.26879E-5
i	6.55158E-8	6.15795E-8	9.40084E-8	-2.67050E-6	2.72166E-6	-6.50325E-5
Ω	-1.84413E-6	-1.73178E-6	-2.67050E-6	7.95123E-5	-8.11581E-5	1.83054E-3
ω	1.87876E-6	1.76419E-6	2.72166E-6	-8.11581E-5	8.28498E-5	-1.86491E-3
M	-4.54077E-5	-4.26879E-5	-6.50325E-5	1.83054E-3	-1.86491E-3	4.50727E-2

Date of computation: 2024-04-23 10:08 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

26.548

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

13 - 29*

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

923

Unit

Source

[1]

Normalized RMS of residuals

Value

0.680173

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-09-14.448731

Unit

Source

[2]

Last Observation

Value

2021-10-14.31294

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

33 (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

[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 2021RO16 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	1952-06-29 08:21	> 1 mo	0.1472927	0.1458910	2.3281128
EARTH	1961-04-09 20:05	> 1 mo	0.1057225	0.0090306	176.2793456
EARTH	1966-09-10 01:20	> 1 mo	0.0065779	0.0065368	0.3198060
EARTH	1975-06-27 09:48	> 1 mo	0.1465178	0.1162847	0.0530207
EARTH	1984-04-16 02:25	> 1 w	0.0197601	0.0071767	0.2161498
EARTH	1989-09-13 03:24	> 1 w	0.0282221	0.0068995	0.0984953
EARTH	1998-06-17 05:51	> 1 mo	0.1432091	0.1063193	0.0129399
EARTH	2007-04-10 17:27	> 1 d	0.1215655	0.0003001	0.0470190
EARTH	2012-09-11 06:16	> 1 d	0.0092715	0.0068830	0.0102333
EARTH	2021-09-11 05:04	< 1 min	0.0073410	0.0073256	0.0000051
EARTH	2034-04-23 08:55	> 1 d	0.0146427	0.0034411	0.0197942
EARTH	2043-09-12 17:04	> 1 w	0.0253632	0.0071526	0.3309093
EARTH	2047-04-19 23:31	> 1 mo	0.0307812	0.0029032	0.4848426
EARTH	2056-09-10 18:52	1104.4	0.0082106	0.0072313	0.0573306
EARTH	2060-04-24 09:05	> 1 mo	0.0103357	0.0012357	2.0832585
EARTH	2077-09-17 08:27	> 1 mo	0.1086304	0.0074318	145.5741575
EARTH	2081-07-14 00:18	> 1 mo	0.1346253	0.0242130	22.3583710
EARTH	2085-04-21 10:50	> 1 mo	0.0240297	0.0013531	136.1771803
EARTH	2098-09-21 08:39	> 1 mo	0.1592953	0.0074541	1749.0921103
EARTH	2102-07-07 02:18	> 1 mo	0.1387504	0.0708273	92.8581652
EARTH	2106-04-15 09:37	> 1 mo	0.1345579	0.0016586	2416.2729183
EARTH	2119-09-14 20:30	> 1 mo	0.0353388	0.0075627	2390.3464407
EARTH	2123-06-16 10:49	> 1 mo	0.1312596	0.0255435	331.0559262

Download as:

2021RO16

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2101-04-24.541	88547.541	-0.148	0.000	0.43 ± 0.000	2.19E7	6.38E-8	8.08E-9	-8.28	0


Based on 33 optical observations (of which 0 are rejected as outliers) from 2021/09/14.449 to 2021/10/14.313.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.78 and 1.78 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20240110 090429.402 UTC.

Download this part as:

Download Impactor Table as: