Asteroids

2019BO help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.946

Aphelion (Q)

2.325

Eccentricity (e)

0.421

Inclination (i)

2.8

deg

Orbit period (P)

764.1

Earth MOID

0.00046

U parameter

7.0

Next Earth close approach

Date

2042-01-27

Nominal distance (from Earth center)

0.0682

10202725

Maximum Brightness

24.6

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

28.1

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2019-01-17

Observatory

University of Arizona Catalina Sky Survey

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.635758

1-sigma variation

0.000326

Unit

Eccentricity (e)

Value

0.421460

1-sigma variation

0.000121

Unit

Inclination (i)

Value

2.7896

1-sigma variation

0.0007

Unit

Long. of Ascending Node (Ω)

Value

295.5830

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

150.1076

1-sigma variation

0.0005

Unit

Mean Anomaly (M)

Value

203.60063

1-sigma variation

0.38782

Unit

Perihelion distance

Value

0.946351

1-sigma variation

Unit

Aphelion distance

Value

2.325165

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.102775

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.001498

1-sigma variation

Unit

MOID

Value

0.000462

1-sigma variation

Unit

Orbit Period

Value

764.1473

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.06506E-7	3.95719E-8	2.17262E-7	2.20041E-8	-1.69234E-7	-1.26564E-4
e	3.95719E-8	1.47029E-8	8.07239E-8	8.21315E-9	-6.29271E-8	-4.70246E-5
i	2.17262E-7	8.07239E-8	4.43222E-7	4.51141E-8	-3.45525E-7	-2.58180E-4
Ω	2.20041E-8	8.21315E-9	4.51141E-8	1.79849E-8	-5.21692E-8	-2.61490E-5
ω	-1.69234E-7	-6.29271E-8	-3.45525E-7	-5.21692E-8	2.91283E-7	2.01107E-4
M	-1.26564E-4	-4.70246E-5	-2.58180E-4	-2.61490E-5	2.01107E-4	1.50401E-1

Date of computation: 2026-06-04 23:11 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

28.068

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

6 - 14*

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

2732

Unit

Source

[1]

Normalized RMS of residuals

Value

0.501136

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2019-01-17.25468

Unit

Source

[2]

Last Observation

Value

2019-02-05.439843

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2019BO from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1962-11-01 09:03	> 1 d	0.0200575	0.0200497	0.0002295
EARTH	1990-12-08 04:18	> 1 w	0.0573902	0.0573720	0.0001054
EARTH	2019-01-16 01:12	< 1 min	0.0004594	0.0004589	0.0000002
EARTH	2042-01-27 22:09	> 1 d	0.0682010	0.0023788	0.0396472
EARTH	2062-11-09 17:37	> 1 w	0.0605167	0.0425954	0.0445627
EARTH	2085-11-19 09:11	> 1 w	0.0414079	0.0410815	0.0096024
EARTH	2108-11-05 07:21	> 1 mo	0.0914199	0.0439940	0.5046705

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
19.11580524	13.71364599	0.00033601	MINIMUM
342.26338575	317.59760892	0.04140711	MINIMUM
355.26031914	337.38439782	0.04627479	SADDLE
179.64529721	164.06302549	1.30816505	SADDLE
359.28562854	163.59033143	1.96345871	SADDLE
179.79157081	344.16085461	3.30910747	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2019BO

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2067-01-16.232	76031.232	-2.540	1.80 ± 0.001	1.43E4	7.06E-7	1.43E-2	-7.74
2073-01-15.562	78222.562	-1.896	1.14 ± 0.027	6.31E6	3.05E-8	1.43E-2	-9.16
2073-01-15.625	78222.625	-2.089	0.19 ± 0.004	1.22E6	1.34E-7	1.43E-2	-8.51
2074-01-15.883	78587.883	-1.713	0.33 ± 0.018	1.71E6	1.93E-7	1.44E-2	-8.36
2078-01-15.967	80048.967	-1.621	1.06 ± 0.001	9.42E4	3.40E-6	1.43E-2	-7.15
2083-01-16.169	81875.169	-1.770	1.37 ± 0.000	5.81E5	3.49E-7	1.43E-2	-8.18
2086-01-15.927	82970.927	-0.980	1.57 ± 0.001	1.88E5	2.48E-6	1.43E-2	-7.34
2099-01-16.079	87719.079	-1.072	0.55 ± 0.014	2.47E6	3.19E-7	1.43E-2	-8.32
2105-01-16.583	89910.583	-0.978	1.58 ± 0.000	1.22E7	3.90E-8	1.43E-2	-9.26


Based on 21 optical observations (of which 0 are rejected as outliers) from 2019/01/17.255 to 2019/02/05.440.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.83 and 1.83 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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