Asteroids

2001YB5 help

Last update: 2024-05-03 18:01 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.317

Aphelion (Q)

4.364

Eccentricity (e)

0.865

Inclination (i)

5.6

deg

Orbit period (P)

1307.8

Earth MOID

0.00343

U parameter

8.4

Next Earth close approach

Date

2120-09-02

Nominal distance (from Earth center)

0.16207

24244725

Maximum Brightness

19.6

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

20.7

mag

Diameter

200 - 400*

Taxonomic type

Rotation period (T)

3.200

Discovery Information

Discovery Date

2001-12-27

Observatory

Palomar Mountain/NEAT

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)
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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.340454

1-sigma variation

0.002532

Unit

Eccentricity (e)

Value

0.864690

1-sigma variation

0.000439

Unit

Inclination (i)

Value

5.5512

1-sigma variation

0.0079

Unit

Long. of Ascending Node (Ω)

Value

108.3108

1-sigma variation

0.0696

Unit

Arg. of Perihelion (ω)

Value

115.3704

1-sigma variation

0.0729

Unit

Mean Anomaly (M)

Value

59.14055

1-sigma variation

4.87885

Unit

Perihelion distance

Value

0.316686

1-sigma variation

Unit

Aphelion distance

Value

4.364221

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.043864

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.585854

1-sigma variation

Unit

MOID

Value

0.003431

1-sigma variation

Unit

Orbit Period

Value

1307.8217

1-sigma variation

Unit

U parameter

Value

8.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.41203E-6	1.11194E-6	2.00341E-5	-1.76266E-4	1.84699E-4	-1.23542E-2
e	1.11194E-6	1.92827E-7	3.47423E-6	-3.05671E-5	3.20297E-5	-2.14240E-3
i	2.00341E-5	3.47423E-6	6.26000E-5	-5.50739E-4	5.77093E-4	-3.86003E-2
Ω	-1.76266E-4	-3.05671E-5	-5.50739E-4	4.84552E-3	-5.07736E-3	3.39615E-1
ω	1.84699E-4	3.20297E-5	5.77093E-4	-5.07736E-3	5.32031E-3	-3.55865E-1
M	-1.23542E-2	-2.14240E-3	-3.86003E-2	3.39615E-1	-3.55865E-1	2.38032E1

Date of computation: 2024-04-23 10:08 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

3.200

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

0.21

Unit

mag

Source

[1]

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

20.651

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[3]

Diameter

Value

200 - 400*

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

Visual S

Unit

Source

[1]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Yang, B. et al. (2003) Astron. J. 126, 1086-1089. (PHOTOMETRY AND SPECTROSCOPY OF THE POTENTIALLY HAZARDOUS ASTEROID 2001 YB5 AND NEAR-EARTH ASTEROID 2001 TX16)
[2]	ESA ODIM	ESA orbit determination and impact monitoring system
[3]	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

8153

Unit

Source

[1]

Normalized RMS of residuals

Value

0.337385

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-12-26.45193

Unit

Source

[2]

Last Observation

Value

2002-01-06.78258

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

403 (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

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 2001YB5 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1966-01-09 17:51	> 1 mo	0.0802693	0.0294186	1.0294205
EARTH	1983-12-30 10:31	> 1 w	0.1577272	0.0294666	0.5517104
MERCURY	1991-04-06 22:41	> 1 w	0.0118893	0.0117373	0.0506639
JUPITER	2000-03-09 16:00	395.2	0.6741366	0.6466081	0.0092400
EARTH	2002-01-07 07:36	< 1 s	0.0055636	0.0055556	0.0000027
VENUS	2027-04-24 16:33	> 1 w	0.0347263	0.0029017	0.3864275
VENUS	2052-07-15 23:52	> 1 mo	0.0142451	0.0142343	0.0451293
VENUS	2059-07-28 04:48	> 1 mo	0.0280840	0.0015234	13.8903071
MERCURY	2091-12-09 19:12	> 1 mo	0.0222997	0.0060718	73.7179547
VENUS	2113-06-12 10:01	> 1 mo	0.0298110	0.0295184	1.7663960
VENUS	2120-06-25 20:42	> 1 mo	0.0405984	0.0276385	51.8476680
EARTH	2120-09-02 05:08	> 1 mo	0.1620660	0.1315932	35.0460917
EARTH	2124-01-04 13:43	> 1 mo	0.1113714	0.0492737	76.7892297

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