Asteroids

2023RB4 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.952

Aphelion (Q)

3.754

Eccentricity (e)

0.595

Inclination (i)

6.0

deg

Orbit period (P)

1318.1

Earth MOID

0.02466

U parameter

9.0

Next Earth close approach

Date

2041-09-25

Nominal distance (from Earth center)

0.06461

9665905

Maximum Brightness

19.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

70 - 150*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-09-09

Observatory

Mt. Lemmon 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.352648

1-sigma variation

0.035588

Unit

Eccentricity (e)

Value

0.595492

1-sigma variation

0.006110

Unit

Inclination (i)

Value

6.0207

1-sigma variation

0.0349

Unit

Long. of Ascending Node (Ω)

Value

208.5388

1-sigma variation

0.1044

Unit

Arg. of Perihelion (ω)

Value

193.2409

1-sigma variation

0.1093

Unit

Mean Anomaly (M)

Value

208.44462

1-sigma variation

4.70158

Unit

Perihelion distance

Value

0.951665

1-sigma variation

Unit

Aphelion distance

Value

3.753631

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.606922

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.034274

1-sigma variation

Unit

MOID

Value

0.024659

1-sigma variation

Unit

Orbit Period

Value

1318.0560

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.26654E-3	2.17446E-4	1.24296E-3	3.71641E-3	-3.88849E-3	-1.67322E-1
e	2.17446E-4	3.73323E-5	2.13399E-4	6.38048E-4	-6.67584E-4	-2.87267E-2
i	1.24296E-3	2.13399E-4	1.21995E-3	3.64673E-3	-3.81490E-3	-1.64207E-1
Ω	3.71641E-3	6.38048E-4	3.64673E-3	1.09069E-2	-1.14144E-2	-4.90973E-1
ω	-3.88849E-3	-6.67584E-4	-3.81490E-3	-1.14144E-2	1.19493E-2	5.13705E-1
M	-1.67322E-1	-2.87267E-2	-1.64207E-1	-4.90973E-1	5.13705E-1	2.21049E1

Date of computation: 2025-09-10 00:30 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

22.967

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

70 - 150*

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 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

738

Unit

Source

[1]

Normalized RMS of residuals

Value

0.505624

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-09-09.444414

Unit

Source

[2]

Last Observation

Value

2023-09-16.40143

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

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 2023RB4 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1958-12-18 17:23	> 1 mo	0.1689701	0.0749398	6.2053445
EARTH	2023-09-18 09:49	1.4	0.1404481	0.1371177	0.0011101
EARTH	2041-09-25 19:34	> 1 mo	0.0646126	0.0351794	1.8347211
EARTH	2059-09-20 19:50	> 1 mo	0.1222276	0.0360964	1.0567238
EARTH	2120-12-22 20:46	> 1 mo	0.1823178	0.0800337	5.4220049
2 Pallas	2124-12-30 23:51	> 1 mo	0.0118740	0.0052832	3.4889611

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
347.68384875	276.35121749	0.02464225	MINIMUM
358.90999268	118.19407861	1.95884675	SADDLE
179.77447783	119.14207222	2.74615654	SADDLE
179.67095700	299.09357444	4.74529507	MAXIMUM

Download:

MOID Plots

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