Asteroids

2023DO help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.519

Aphelion (Q)

1.028

Eccentricity (e)

0.329

Inclination (i)

2.9

deg

Orbit period (P)

248.6

Earth MOID

0.00097

U parameter

7.0

Next Earth close approach

Date

2038-03-27

Nominal distance (from Earth center)

0.02592

3877120

Maximum Brightness

22.9

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

25.6

mag

Diameter

21 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-02-23

Observatory

MARGO, Nauchnyi

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

0.773725

1-sigma variation

0.000062

Unit

Eccentricity (e)

Value

0.328957

1-sigma variation

0.000147

Unit

Inclination (i)

Value

2.8601

1-sigma variation

0.0015

Unit

Long. of Ascending Node (Ω)

Value

4.5894

1-sigma variation

0.0151

Unit

Arg. of Perihelion (ω)

Value

338.1028

1-sigma variation

0.0149

Unit

Mean Anomaly (M)

Value

103.89491

1-sigma variation

0.23122

Unit

Perihelion distance

Value

0.519203

1-sigma variation

Unit

Aphelion distance

Value

1.028248

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.474157

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.003778

1-sigma variation

Unit

MOID

Value

0.000969

1-sigma variation

Unit

Orbit Period

Value

248.5872

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.81309E-9	-9.07901E-9	-9.53181E-8	9.34544E-7	-9.22755E-7	-1.42778E-5
e	-9.07901E-9	2.16172E-8	2.26954E-7	-2.22516E-6	2.19709E-6	3.39957E-5
i	-9.53181E-8	2.26954E-7	2.38281E-6	-2.33621E-5	2.30673E-5	3.56912E-4
Ω	9.34544E-7	-2.22516E-6	-2.33621E-5	2.29053E-4	-2.26164E-4	-3.49933E-3
ω	-9.22755E-7	2.19709E-6	2.30673E-5	-2.26164E-4	2.23311E-4	3.45519E-3
M	-1.42778E-5	3.39957E-5	3.56912E-4	-3.49933E-3	3.45519E-3	5.34624E-2

Date of computation: 2026-03-17 23:26 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

25.557

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

21 - 50*

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

1091

Unit

Source

[1]

Normalized RMS of residuals

Value

0.819162

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-02-13.47701

Unit

Source

[2]

Last Observation

Value

2023-03-26.328411

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

52 (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

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 2023DO 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	1951-03-30 07:22	621.5	0.1459535	0.1140548	0.0106401
EARTH	1953-03-23 03:44	420.3	0.0066963	0.0044093	0.0019815
EARTH	1955-02-04 23:05	> 1 d	0.0491146	0.0379891	0.0049937
EARTH	1970-03-28 15:49	> 1 d	0.0373193	0.0026676	0.0643559
EARTH	1972-02-14 02:42	> 1 w	0.0363581	0.0351824	0.0078421
VENUS	1973-12-29 05:43	> 1 d	0.0313148	0.0305198	0.0102730
EARTH	1974-02-03 14:08	1014.6	0.1756425	0.0751053	0.0348367
EARTH	1987-03-29 20:33	14.0	0.1703528	0.1694675	0.0002951
EARTH	1989-03-19 19:50	> 1 d	0.0180927	0.0075251	0.0035398
EARTH	1991-02-03 08:17	325.3	0.0715575	0.0552703	0.0057338
VENUS	1992-02-09 13:54	566.8	0.0464888	0.0394718	0.0049909
EARTH	2004-03-29 04:23	224.1	0.1639968	0.1343051	0.0098975
VENUS	2005-01-11 22:22	813.7	0.0414788	0.0393049	0.0040301
EARTH	2006-03-14 08:05	> 1 d	0.0310880	0.0165323	0.0048761
EARTH	2008-02-02 21:08	95.8	0.1014990	0.0737468	0.0095332
VENUS	2012-09-29 12:30	437.0	0.0444452	0.0318289	0.0064742
EARTH	2021-03-29 18:58	35.7	0.0826966	0.0777340	0.0016542
EARTH	2023-02-18 23:13	< 1 min	0.0398668	0.0398088	0.0000193
EARTH	2025-02-03 01:31	41.0	0.1795436	0.1745671	0.0016601
VENUS	2037-01-06 16:36	697.6	0.0462415	0.0400650	0.0056723
EARTH	2038-03-27 16:01	1073.0	0.0259169	0.0006693	0.0084433
EARTH	2040-02-10 16:37	927.0	0.0342173	0.0342167	0.0000155
VENUS	2051-07-05 19:28	1164.2	0.0403617	0.0319862	0.0156086
EARTH	2055-03-30 15:56	94.6	0.1137926	0.0350939	0.0262504
EARTH	2057-03-03 12:02	> 1 w	0.0408821	0.0343326	0.0034096
EARTH	2059-02-03 02:29	173.7	0.1238739	0.0505204	0.0265237
VENUS	2064-06-03 20:15	1215.1	0.0394566	0.0324810	0.0150480
EARTH	2072-03-29 04:07	452.7	0.1662976	0.1088166	0.0191649
EARTH	2074-03-16 17:48	> 1 d	0.0256391	0.0032898	0.0088186
EARTH	2076-02-03 07:39	67.4	0.0877042	0.0619456	0.0089829
EARTH	2089-03-29 21:23	434.4	0.1257554	0.0044631	0.0426339
VENUS	2090-04-07 07:32	> 1 d	0.0365773	0.0328236	0.0263301
EARTH	2091-03-02 15:20	> 1 w	0.0414003	0.0376088	0.0045102
EARTH	2093-02-02 12:41	960.2	0.1442599	0.0367634	0.0567674
EARTH	2106-03-29 15:57	> 1 d	0.0382711	0.0023576	0.0692379
EARTH	2108-02-12 02:46	> 1 w	0.0333809	0.0333804	0.0001427
VENUS	2114-07-15 08:35	340.2	0.0436450	0.0413850	0.0011182
EARTH	2123-03-31 03:13	> 1 d	0.0688515	0.0039265	0.0637393
EARTH	2125-02-20 12:31	> 1 w	0.0379863	0.0356435	0.0104261

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
208.34798970	80.75684079	0.00138569	MINIMUM
150.10513739	39.31054910	0.03468759	MINIMUM
173.14594566	55.74645633	0.04196252	SADDLE
355.04819765	236.04604416	0.49078275	SADDLE
355.36251341	56.46493628	1.51093159	SADDLE
177.68189625	238.92730256	2.03749212	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2023DO

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2057-03-23.822	72445.822	1.056	0.68 ± 0.002	1.65E3	4.89E-4	5.46E-1	-3.50
2059-03-24.020	73176.020	1.084	1.05 ± 0.002	1.03E5	6.96E-6	5.46E-1	-5.38
2062-03-23.868	74271.868	1.046	1.38 ± 0.011	3.11E6	1.92E-7	5.47E-1	-6.97
2062-03-24.047	74272.047	3.670	0.03 ± 0.000	1.71E7	1.05E-10	5.47E-1	-10.24
2065-03-23.902	75367.902	2.408	1.40 ± 0.002	4.63E4	1.36E-6	5.49E-1	-6.16
2066-03-23.909	75732.909	1.033	0.53 ± 0.000	6.17E5	1.37E-6	5.48E-1	-6.16
2068-03-23.424	76463.424	1.022	1.78 ± 0.000	4.06E5	7.99E-7	5.47E-1	-6.42
2073-03-23.839	78289.839	3.507	0.07 ± 0.089	8.18E6	3.92E-10	5.48E-1	-9.77


Based on 52 optical observations (of which 0 are rejected as outliers) from 2023/02/13.477 to 2023/03/26.328.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.89 and 1.89 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250805 130500.123 UTC.

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