Asteroids

2021GX7 help

Last update: 2024-04-23 14:44 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.697

Aphelion (Q)

1.398

Eccentricity (e)

0.335

Inclination (i)

2.4

deg

Orbit period (P)

391.4

Earth MOID

0.01085

U parameter

7.6

Next Earth close approach

Date

2024-11-19

Nominal distance (from Earth center)

0.08443

12631135

Maximum Brightness

24.7

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.7

mag

Diameter

12 - 27*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-10

Observatory

Pan-STARRS 1, Haleakala

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

1.047205

1-sigma variation

0.000325

Unit

Eccentricity (e)

Value

0.334567

1-sigma variation

0.000545

Unit

Inclination (i)

Value

2.3512

1-sigma variation

0.0045

Unit

Long. of Ascending Node (Ω)

Value

195.3132

1-sigma variation

0.0068

Unit

Arg. of Perihelion (ω)

Value

118.2820

1-sigma variation

0.0136

Unit

Mean Anomaly (M)

Value

205.63035

1-sigma variation

0.40455

Unit

Perihelion distance

Value

0.696844

1-sigma variation

Unit

Aphelion distance

Value

1.397565

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.104538

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.195482

1-sigma variation

Unit

MOID

Value

0.010854

1-sigma variation

Unit

Orbit Period

Value

391.4226

1-sigma variation

Unit

U parameter

Value

7.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.05331E-7	1.75960E-7	1.45283E-6	2.20956E-6	-4.16975E-6	-1.31290E-4
e	1.75960E-7	2.96948E-7	2.42151E-6	3.65796E-6	-6.72552E-6	-2.19154E-4
i	1.45283E-6	2.42151E-6	2.00557E-5	3.05575E-5	-5.79723E-5	-1.81120E-3
Ω	2.20956E-6	3.65796E-6	3.05575E-5	4.67814E-5	-9.01903E-5	-2.75604E-3
ω	-4.16975E-6	-6.72552E-6	-5.79723E-5	-9.01903E-5	1.84382E-4	5.21124E-3
M	-1.31290E-4	-2.19154E-4	-1.81120E-3	-2.75604E-3	5.21124E-3	1.63657E-1

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

26.748

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

12 - 27*

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 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

1106

Unit

Source

[1]

Normalized RMS of residuals

Value

0.416871

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-04-10.493471

Unit

Source

[2]

Last Observation

Value

2021-04-14.05355

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

13 (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 2021GX7 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	1950-04-23 03:59	> 1 w	0.1695469	0.0124930	0.2415699
EARTH	1952-11-10 12:09	> 1 w	0.0983117	0.0255542	0.3156851
EARTH	1964-04-23 12:40	> 1 w	0.1621146	0.0116751	0.3477194
EARTH	1966-11-09 20:47	> 1 w	0.1331768	0.0269607	0.2825873
EARTH	1978-04-21 15:39	> 1 d	0.0237321	0.0106804	0.1483994
EARTH	1992-04-19 08:05	> 1 d	0.0284350	0.0107595	0.0417093
EARTH	1995-11-20 21:20	> 1 d	0.1246608	0.0253999	0.0494589
EARTH	2009-11-11 11:35	> 1 d	0.0966114	0.0251799	0.0345746
EARTH	2021-04-20 05:47	1.1	0.0165969	0.0165140	0.0000276
EARTH	2024-11-19 00:39	484.1	0.0844339	0.0608672	0.0080057
EARTH	2036-04-23 15:08	> 1 d	0.0827026	0.0113597	0.0463388
EARTH	2051-04-24 01:55	> 1 d	0.1622841	0.0601398	0.0342091
EARTH	2053-10-31 07:41	> 1 d	0.1815871	0.1029225	0.0266286
EARTH	2053-11-13 19:48	> 1 d	0.1813778	0.1002541	0.0272724
EARTH	2068-11-12 04:46	430.3	0.0898903	0.0568289	0.0112804
EARTH	2080-04-17 10:44	> 1 d	0.0845106	0.0117687	0.0466314
EARTH	2083-11-17 03:36	> 1 d	0.0282745	0.0261630	0.0176666
EARTH	2095-04-21 02:15	> 1 d	0.0218267	0.0123764	0.1281736
EARTH	2098-11-18 22:08	> 1 d	0.0530915	0.0294734	0.0154189
EARTH	2110-04-21 09:45	> 1 w	0.0380435	0.0128412	0.3855922
EARTH	2113-11-18 22:31	> 1 w	0.0334788	0.0264403	0.1311246

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