Asteroids

2023DW help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.495

Aphelion (Q)

1.145

Eccentricity (e)

0.396

Inclination (i)

5.8

deg

Orbit period (P)

271.2

Earth MOID

0.00054

U parameter

1.4

Next Earth close approach

Date

2029-04-15

Nominal distance (from Earth center)

0.1479

22124975

Maximum Brightness

21.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.3

mag

Diameter

40 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-02-26

Observatory

MAPS, San Pedro de Atacama

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

0.820030

1-sigma variation

1.127E-8

Unit

Eccentricity (e)

Value

0.396236

1-sigma variation

3.997E-7

Unit

Inclination (i)

Value

5.8047

1-sigma variation

1.626E-5

Unit

Long. of Ascending Node (Ω)

Value

326.0742

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

40.4643

1-sigma variation

2.828E-5

Unit

Mean Anomaly (M)

Value

272.87071

1-sigma variation

0.00015

Unit

Perihelion distance

Value

0.495105

1-sigma variation

Unit

Aphelion distance

Value

1.144955

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.481341

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.002002

1-sigma variation

Unit

MOID

Value

0.000543

1-sigma variation

Unit

Orbit Period

Value

271.2331

1-sigma variation

Unit

U parameter

Value

1.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.26974E-16	-3.16786E-15	-8.76736E-14	-5.40921E-14	-7.65376E-15	5.75334E-14
e	-3.16786E-15	1.59739E-13	5.59962E-12	1.66005E-11	6.87625E-13	-3.85400E-11
i	-8.76736E-14	5.59962E-12	2.64465E-10	9.93325E-10	-1.69170E-10	-1.82089E-9
Ω	-5.40921E-14	1.66005E-11	9.93325E-10	5.15580E-9	-7.52437E-10	-9.60830E-9
ω	-7.65376E-15	6.87625E-13	-1.69170E-10	-7.52437E-10	7.99530E-10	-1.35072E-10
M	5.75334E-14	-3.85400E-11	-1.82089E-9	-9.60830E-9	-1.35072E-10	2.16339E-8

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

24.284

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

40 - 80*

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

1118

Unit

Source

[1]

Unobserved

Value

100

Unit

Source

[1]

Normalized RMS of residuals

Value

0.561911

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-02-26.12762

Unit

Source

[2]

Last Observation

Value

2026-03-20.35116

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

133 (2)

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 2023DW 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	1951-04-16 15:00	< 1 min	0.1462291	0.1462263	0.0000009
EARTH	1954-05-04 15:33	< 1 min	0.1007934	0.1007919	0.0000005
VENUS	1963-07-29 04:29	< 1 min	0.0325587	0.0325572	0.0000005
EARTH	1968-02-14 19:32	< 1 min	0.0473846	0.0473794	0.0000017
EARTH	1971-02-23 05:08	< 1 min	0.0919442	0.0919414	0.0000009
EARTH	1974-03-21 07:53	< 1 min	0.1600364	0.1600354	0.0000004
EARTH	1977-04-18 06:56	< 1 min	0.1430658	0.1430639	0.0000007
EARTH	1980-05-04 10:31	< 1 min	0.1015851	0.1015844	0.0000002
EARTH	1994-02-14 15:37	< 1 min	0.0763187	0.0763107	0.0000027
EARTH	1997-02-19 04:50	< 1 min	0.0699285	0.0699221	0.0000021
EARTH	2000-03-16 23:52	< 1 min	0.1557367	0.1557353	0.0000005
EARTH	2003-04-16 12:19	< 1 min	0.1476445	0.1476415	0.0000010
EARTH	2006-05-04 20:43	< 1 min	0.1002507	0.1002500	0.0000002
EARTH	2009-05-02 21:08	< 1 min	0.1945841	0.1945787	0.0000018
EARTH	2020-02-15 17:45	< 1 min	0.1030766	0.1030754	0.0000004
VENUS	2020-10-13 01:01	< 1 min	0.0405996	0.0405977	0.0000006
EARTH	2023-02-18 12:56	< 1 min	0.0583432	0.0583423	0.0000003
EARTH	2026-03-16 20:19	< 1 min	0.1547454	0.1547446	0.0000003
EARTH	2029-04-15 20:05	< 1 min	0.1478963	0.1478947	0.0000006
EARTH	2032-05-04 12:08	< 1 min	0.1011913	0.1011906	0.0000002
VENUS	2042-04-26 01:18	< 1 min	0.0325135	0.0325105	0.0000010
EARTH	2046-02-14 13:38	< 1 min	0.0272162	0.0272056	0.0000035
EARTH	2049-02-25 14:42	< 1 min	0.1050702	0.1050676	0.0000009
EARTH	2052-03-23 19:06	< 1 min	0.1626063	0.1626055	0.0000003
EARTH	2055-04-21 06:33	1.1	0.1396894	0.1396838	0.0000019
EARTH	2058-05-05 11:40	< 1 min	0.1036501	0.1036455	0.0000016
EARTH	2072-02-15 15:35	< 1 min	0.0916933	0.0916557	0.0000125
EARTH	2075-02-18 04:23	1.4	0.0546521	0.0546211	0.0000103
EARTH	2078-03-14 08:44	3.1	0.1510929	0.1510849	0.0000027
VENUS	2080-09-29 17:47	< 1 min	0.0486830	0.0486809	0.0000007
EARTH	2081-04-12 16:19	2.0	0.1535292	0.1535239	0.0000017
EARTH	2084-05-04 04:24	< 1 min	0.1005201	0.1005187	0.0000005
EARTH	2087-05-04 06:14	< 1 min	0.1788612	0.1788567	0.0000015
EARTH	2098-02-15 22:27	< 1 min	0.1243225	0.1243000	0.0000075
VENUS	2099-07-13 04:44	< 1 min	0.0307427	0.0307343	0.0000028
EARTH	2101-02-17 11:45	< 1 min	0.0382657	0.0382355	0.0000101
EARTH	2104-03-14 12:18	4.3	0.1505453	0.1505336	0.0000039
EARTH	2107-04-15 12:21	4.3	0.1519515	0.1519401	0.0000038
EARTH	2110-05-06 04:52	< 1 min	0.1008149	0.1008107	0.0000014
VENUS	2121-01-22 20:26	1.1	0.0441454	0.0440936	0.0000173
EARTH	2124-02-16 09:02	< 1 min	0.0157341	0.0156853	0.0000163

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
121.06503815	40.74271379	0.00054287	MINIMUM
234.33449040	118.53079173	0.09990439	MINIMUM
182.70107359	82.93406001	0.16355948	SADDLE
356.86129594	259.12339754	0.50957465	SADDLE
356.07605641	77.91078112	1.49160875	SADDLE
177.78217671	259.70458496	2.14652867	MAXIMUM

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MOID Plots

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