Asteroids

306383 1993VD help

Last update: 2025-10-18 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.393

Aphelion (Q)

1.359

Eccentricity (e)

0.552

Inclination (i)

2.1

deg

Orbit period (P)

299.3

Earth MOID

0.01733

U parameter

0.7

A₂

-25.3

10^-15au/days²

Next Earth close approach

Date

2027-01-24

Nominal distance (from Earth center)

0.07913

11837781

Maximum Brightness

18.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.4

mag

Diameter

140 - 300*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1993-11-09

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

0.875733

1-sigma variation

5.656E-9

Unit

Eccentricity (e)

Value

0.551522

1-sigma variation

8.040E-8

Unit

Inclination (i)

Value

2.0661

1-sigma variation

2.464E-6

Unit

Long. of Ascending Node (Ω)

Value

2.1484

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

254.2591

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

127.11644

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.392747

1-sigma variation

Unit

Aphelion distance

Value

1.358720

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.286876

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.467684

1-sigma variation

Unit

MOID

Value

0.017332

1-sigma variation

Unit

Orbit Period

Value

299.3342

1-sigma variation

Unit

U parameter

Value

0.7

1-sigma variation

Unit

A₂

Value

-25.31537

1-sigma variation

4.42432

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	3.19955E-17	-2.73517E-16	5.75805E-16	1.18311E-13	-1.22280E-13	-1.84307E-13	2.41506E-8
e	-2.73517E-16	6.46337E-15	-1.12571E-14	-3.46020E-13	4.95673E-13	2.04173E-12	-1.54343E-7
i	5.75805E-16	-1.12571E-14	6.07127E-12	-5.47159E-11	5.77688E-11	-7.13512E-12	-7.84770E-8
Ω	1.18311E-13	-3.46020E-13	-5.47159E-11	1.43104E-8	-1.41093E-8	-7.65101E-10	8.91487E-5
ω	-1.22280E-13	4.95673E-13	5.77688E-11	-1.41093E-8	1.39376E-8	7.77826E-10	-8.98090E-5
M	-1.84307E-13	2.04173E-12	-7.13512E-12	-7.65101E-10	7.77826E-10	1.14697E-9	-1.32600E-4
A₂	2.41506E-8	-1.54343E-7	-7.84770E-8	8.91487E-5	-8.98090E-5	-1.32600E-4	1.95746E1

Date of computation: 2025-10-18 13:00 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

21.401

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

140 - 300*

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude
[3]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

11665

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.61127

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1993-11-09.42952

Unit

Source

[2]

Last Observation

Value

2025-10-17.48232

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

177 (4)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2018-01-23

Unit

Source

[3]

Last Observation

Value

2018-01-23

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (0)

Unit

Source

[1]

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
[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 306383 1993VD 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	1954-01-19 08:52	< 1 min	0.1342805	0.1342765	0.0000013
MERCURY	1956-09-08 11:53	< 1 min	0.0388242	0.0388222	0.0000007
EARTH	1956-10-26 19:39	< 1 min	0.1179892	0.1179849	0.0000014
EARTH	1963-01-23 17:48	< 1 min	0.0486682	0.0486651	0.0000010
MERCURY	1966-07-01 02:43	< 1 min	0.0431984	0.0431947	0.0000012
EARTH	1970-10-24 18:51	< 1 min	0.1333659	0.1333623	0.0000012
MERCURY	1974-09-30 10:49	< 1 min	0.0464026	0.0463999	0.0000009
EARTH	1979-10-25 09:37	< 1 min	0.0423024	0.0422991	0.0000011
MERCURY	1984-07-24 03:32	< 1 min	0.0450078	0.0450055	0.0000007
EARTH	1986-01-22 18:38	< 1 min	0.0361030	0.0361019	0.0000004
MERCURY	1992-10-23 01:25	< 1 min	0.0468887	0.0468880	0.0000003
EARTH	1993-10-28 06:43	< 1 min	0.1909997	0.1909989	0.0000002
EARTH	1995-01-22 01:25	< 1 min	0.1518029	0.1518019	0.0000004
MERCURY	2002-08-13 09:01	< 1 min	0.0232803	0.0232798	0.0000002
EARTH	2002-10-23 23:19	< 1 s	0.0412308	0.0412305	0.0000001
EARTH	2009-01-18 19:56	< 1 s	0.1495506	0.1495499	0.0000002
EARTH	2011-10-26 23:42	< 1 s	0.0901945	0.0901939	0.0000002
EARTH	2018-01-22 18:57	< 1 s	0.0367972	0.0367971	0.0000001
MERCURY	2019-01-23 18:09	< 1 min	0.0472129	0.0472124	0.0000002
MERCURY	2023-03-02 04:54	< 1 min	0.0365319	0.0365319	0.0000000
EARTH	2027-01-24 02:19	< 1 s	0.0791307	0.0791295	0.0000004
MERCURY	2027-04-07 16:43	< 1 min	0.0484587	0.0484570	0.0000006
EARTH	2034-10-26 22:03	< 1 min	0.1659928	0.1659900	0.0000009
EARTH	2036-01-21 09:32	< 1 min	0.1673592	0.1673567	0.0000008
MERCURY	2037-01-18 06:01	< 1 min	0.0382514	0.0382474	0.0000013
MERCURY	2041-02-23 14:42	< 1 min	0.0214816	0.0214814	0.0000001
EARTH	2043-10-24 10:58	< 1 min	0.0843347	0.0843300	0.0000016
MERCURY	2045-04-01 01:53	< 1 min	0.0311058	0.0311015	0.0000014
MERCURY	2049-05-07 16:50	< 1 min	0.0450526	0.0450475	0.0000017
EARTH	2052-10-24 02:48	< 1 min	0.0202476	0.0202443	0.0000011
EARTH	2059-01-18 06:44	< 1 min	0.1816026	0.1815874	0.0000051
EARTH	2061-10-25 06:31	< 1 min	0.0366448	0.0366278	0.0000056
EARTH	2068-01-20 21:36	< 1 min	0.1179442	0.1179263	0.0000060
EARTH	2070-10-27 13:52	< 1 min	0.1056301	0.1056127	0.0000058
EARTH	2077-01-22 08:58	< 1 min	0.0488087	0.0487982	0.0000035
EARTH	2079-10-30 08:33	< 1 min	0.1761062	0.1760957	0.0000035
EARTH	2086-01-23 20:12	< 1 min	0.0360111	0.0360092	0.0000007
EARTH	2095-01-24 01:51	< 1 min	0.1052732	0.1052686	0.0000015
MERCURY	2098-07-19 00:44	< 1 min	0.0409060	0.0409021	0.0000013
MERCURY	2102-08-26 02:52	< 1 min	0.0400722	0.0400666	0.0000019
EARTH	2102-10-26 23:59	< 1 min	0.1436897	0.1436806	0.0000030
EARTH	2104-01-20 23:39	< 1 min	0.1896182	0.1896087	0.0000032
EARTH	2111-10-25 17:30	< 1 min	0.0497315	0.0497181	0.0000045
MERCURY	2112-06-07 23:23	< 1 min	0.0495795	0.0495589	0.0000069
MERCURY	2116-07-14 01:43	< 1 min	0.0258293	0.0258188	0.0000035
EARTH	2118-01-19 03:46	< 1 min	0.1878694	0.1878566	0.0000043
MERCURY	2120-08-19 15:29	< 1 min	0.0261405	0.0261322	0.0000028
EARTH	2120-10-26 11:30	< 1 min	0.0445560	0.0445461	0.0000033

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
104.14944581	290.55841646	0.01733185	MINIMUM
257.12198452	21.15658384	0.03059218	MINIMUM
180.52267827	335.67299189	0.37578883	SADDLE
1.55948320	156.99422310	0.62429869	SADDLE
1.49368406	336.89944071	1.37759028	SADDLE
180.45036530	155.64392154	2.37493446	MAXIMUM

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MOID Plots

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