Asteroids

1979XB

Last update: 2023-03-21 02:34 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.649

Aphelion (Q)

4.482

Eccentricity (e)

0.747

Inclination (i)

25.3

deg

Orbit period (P)

1501.0

Earth MOID

0.00344

U parameter

9.0

Next Earth close approach

Date

2024-12-10

Nominal distance (from Earth center)

0.07459

11157796

Maximum Brightness

15.9

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

18.5

mag

Diameter

700*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1979-12-11

Observatory

Siding Spring Observatory

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)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.565598

1-sigma variation

0.645752

Unit

Eccentricity (e)

Value

0.746891

1-sigma variation

0.003158

Unit

Inclination (i)

Value

25.3061

1-sigma variation

4.4494

Unit

Ascending Node (Ω)

Value

81.6399

1-sigma variation

36.0846

Unit

Arg. of Perihelion (ω)

Value

78.8509

1-sigma variation

35.0309

Unit

Mean Anomaly (M)

Value

192.94418

1-sigma variation

1767.20000

Unit

Perihelion

Value

0.649375

1-sigma variation

Unit

Aphelion

Value

4.481821

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.006166

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.310080

1-sigma variation

Unit

MOID

Value

0.003443

1-sigma variation

Unit

Orbit Period

Value

1501.0020

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.16995E-1	-2.03897E-3	2.87319E0	2.33017E1	-2.26212E1	-1.14117E3
e	-2.03897E-3	9.97036E-6	-1.40489E-2	-1.13937E-1	1.10610E-1	5.57995E0
i	2.87319E0	-1.40489E-2	1.97970E1	1.60554E2	-1.55866E2	-7.86295E3
Ω	2.33017E1	-1.13937E-1	1.60554E2	1.30210E3	-1.26407E3	-6.37687E4
ω	-2.26212E1	1.10610E-1	-1.55866E2	-1.26407E3	1.22716E3	6.19065E4
M	-1.14117E3	5.57995E0	-7.86295E3	-6.37687E4	6.19065E4	3.12300E6

Date of computation: 2022-11-23 04:56 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

18.456

Unit

mag

Source

[1]

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

700*

Unit

Source

[3]

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]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[3]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

15802

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.449806

Unit

arcsec

Source

[1]

First Observation

Value

1979-12-11.51059

Unit

Source

[2]

Last Observation

Value

1979-12-15.42951

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

18 (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 1979XB from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1979-12-17 11:22	< 1 min	0.0383699	0.0296633	0.0029022
EARTH	2024-12-10 01:15	> 1 mo	0.0745853	0.0041938	132.0039318
EARTH	2033-05-31 23:41	> 1 mo	0.1504349	0.1338672	32.0187465
EARTH	2061-12-24 11:15	> 1 mo	0.1724132	0.0028234	130.9500538
EARTH	2102-12-13 06:14	> 1 mo	0.0065702	0.0060586	142.3126164
EARTH	2111-05-24 03:59	> 1 mo	0.1611500	0.0902806	15560.4447356

Download as:

1979XB

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2056-12-12.902	72344.902	0.255	0.22 ± 0.106	3.53E6	2.34E-7	1.30E-2	-2.86
2065-12-16.463	75635.463	-1.110	1.10 ± 0.091	3.58E7	2.72E-9	3.30E-5	-5.42
2101-12-14.204	88781.204	-0.384	0.61 ± 0.000	1.97E8	3.46E-9	8.60E-5	-5.32
2113-12-14.753	93164.753	-0.706	0.25 ± 0.028	1.37E6	4.94E-7	8.79E-3	-3.35


Based on 18 optical observations (of which 0 are rejected as outliers) from 1979/12/11.511 to 1979/12/15.430.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.09 and 1.09 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20220707 154927.549 UTC.

Download this part as:

Download Impactor Table as: