Asteroids

2001VB

Last update: 2023-03-30 21:00 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.247

Aphelion (Q)

4.583

Eccentricity (e)

0.898

Inclination (i)

7.6

deg

Orbit period (P)

1370.5

Earth MOID

0.01504

U parameter

9.0

Next Earth close approach

Date

2050-07-30

Nominal distance (from Earth center)

0.18025

26964598

Maximum Brightness

18.4

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

18.4

mag

Diameter

700*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2001-11-04

Observatory

Lincoln Laboratory ETS, New Mexico

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.414648

1-sigma variation

0.185697

Unit

Eccentricity (e)

Value

0.897796

1-sigma variation

0.007044

Unit

Inclination (i)

Value

7.5912

1-sigma variation

0.8008

Unit

Ascending Node (Ω)

Value

290.8282

1-sigma variation

22.9349

Unit

Arg. of Perihelion (ω)

Value

239.5405

1-sigma variation

22.1083

Unit

Mean Anomaly (M)

Value

244.28070

1-sigma variation

168.22200

Unit

Perihelion

Value

0.246786

1-sigma variation

Unit

Aphelion

Value

4.582511

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.157349

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.662000

1-sigma variation

Unit

MOID

Value

0.015045

1-sigma variation

Unit

Orbit Period

Value

1370.5007

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.44832E-2	-1.30801E-3	1.48710E-1	4.25893E0	-4.10544E0	-3.12382E1
e	-1.30801E-3	4.96154E-5	-5.64087E-3	-1.61549E-1	1.55727E-1	1.18492E0
i	1.48710E-1	-5.64087E-3	6.41320E-1	1.83668E1	-1.77049E1	-1.34716E2
Ω	4.25893E0	-1.61549E-1	1.83668E1	5.26010E2	-5.07052E2	-3.85815E3
ω	-4.10544E0	1.55727E-1	-1.77049E1	-5.07052E2	4.88778E2	3.71910E3
M	-3.12382E1	1.18492E0	-1.34716E2	-3.85815E3	3.71910E3	2.82985E4

Date of computation: 2022-11-23 04:56 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

18.404

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

700*

Unit

Source

[3]

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 ODIM	ESA orbit determination and impact monitoring system
[2]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[3]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

7809

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.544454

Unit

arcsec

Source

[1]

First Observation

Value

2001-11-04.0703

Unit

Source

[2]

Last Observation

Value

2001-11-11.73463

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

53 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	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 2001VB from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1983-07-15 23:50	> 1 mo	0.1264872	0.0246278	8.6597305
EARTH	2001-11-07 07:14	< 1 min	0.1635078	0.1566393	0.0022895
VENUS	2002-01-09 05:25	584.0	0.0220815	0.0220446	0.0000569
MERCURY	2035-08-26 03:46	> 1 mo	0.0349619	0.0134571	24.1646110
EARTH	2050-07-30 04:32	> 1 mo	0.1802472	0.0418024	23.0743150
EARTH	2076-07-19 10:59	> 1 mo	0.0572406	0.0454806	5.6405343
EARTH	2091-07-12 17:12	> 1 mo	0.1800374	0.0649905	9.4156966
VENUS	2098-10-30 22:32	> 1 mo	0.0476458	0.0269637	20.0495715
EARTH	2117-07-26 02:17	> 1 mo	0.1262928	0.1056356	12.1768936

Download as:

2001VB

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2023-07-23.303	60148.303	3.418	0.000	1.00 ± 0.537	3.36E5	2.81E-9	8.56E-4	-2.64	0
2089-07-18.936	84250.936	-3.108	0.650	1.06 ± 0.479	4.43E6	1.84E-10	5.06E-6	-6.49	0


Based on 53 optical observations (of which 0 are rejected as outliers) from 2001/11/04.070 to 2001/11/11.735.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.05 and 1.05 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20220728 172539.223 UTC.

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