Asteroids

2015WP2

Last update: 2022-05-24 13:10 UTC

Orbital Properties

Epoch

59600.0

MJD

Orbit type

Apollo

Perihelion (q)

0.779

Aphelion (Q)

2.090

Eccentricity (e)

0.457

Inclination (i)

1.7

deg

Orbit period (P)

627.7

Earth MOID

0.00054

U parameter

7.4

Next Earth close approach

Date

2022-06-26

Nominal distance (from Earth center)

0.04689

7014039

Maximum Brightness

127

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

30.1

mag

Diameter

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-11-21

Observatory

Mt. Lemmon Survey

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

59600.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.434674

1-sigma variation

0.000438

Unit

Eccentricity (e)

Value

0.457052

1-sigma variation

0.000270

Unit

Inclination (i)

Value

1.7192

1-sigma variation

0.0004

Unit

Ascending Node (Ω)

Value

58.0861

1-sigma variation

0.0235

Unit

Arg. of Perihelion (ω)

Value

287.9060

1-sigma variation

0.0163

Unit

Mean Anomaly (M)

Value

240.82008

1-sigma variation

0.69403

Unit

Perihelion

Value

0.778953

1-sigma variation

Unit

Aphelion

Value

2.090394

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.006993

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.310851

1-sigma variation

Unit

MOID

Value

0.000535

1-sigma variation

Unit

Orbit Period

Value

627.6652

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.91737E-7	1.18312E-7	1.77248E-7	-1.02949E-5	7.12009E-6	-3.03901E-4
e	1.18312E-7	7.30223E-8	1.09302E-7	-6.35245E-6	4.39010E-6	-1.87523E-4
i	1.77248E-7	1.09302E-7	1.64925E-7	-9.51705E-6	6.59496E-6	-2.80937E-4
Ω	-1.02949E-5	-6.35245E-6	-9.51705E-6	5.52764E-4	-3.82310E-4	1.63173E-2
ω	7.12009E-6	4.39010E-6	6.59496E-6	-3.82310E-4	2.65046E-4	-1.12853E-2
M	-3.03901E-4	-1.87523E-4	-2.80937E-4	1.63173E-2	-1.12853E-2	4.81681E-1

Date of computation: 2022-04-08 05:58 UTC

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

30.08

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

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

[-]

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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

2374

Unit

Source

[1]

Astrometry Summary

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

Optical

Value

Unit

Source

RMS of Residuals

Value

0.53685

Unit

arcsec

Source

[1]

First Observation

Value

2015-11-21.19581

Unit

Source

[2]

Last Observation

Value

2015-11-23.203902

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

40 (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 2015WP2 from 1950 to 2122

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1957-11-21 00:12	> 1 w	0.0307932	0.0006067	0.2107919
EARTH	1962-11-05 19:44	> 1 mo	0.1148572	0.0006403	0.3077978
MARS	1967-04-28 23:41	> 1 d	0.0394312	0.0036761	0.2856474
EARTH	1982-06-25 09:17	> 1 w	0.0810503	0.0134127	0.2289035
EARTH	1987-06-12 12:20	> 1 w	0.0809913	0.0133162	0.2158102
VENUS	2005-10-22 02:30	> 1 w	0.0497005	0.0491205	0.0049201
EARTH	2015-11-20 01:43	< 1 min	0.0015362	0.0015337	0.0000008
MARS	2021-04-17 16:47	418.9	0.0336261	0.0066306	0.0125626
EARTH	2022-06-26 06:47	> 1 d	0.0468860	0.0164748	0.0205073
EARTH	2046-10-07 10:49	> 1 d	0.1985069	0.1769063	0.0068088
EARTH	2053-06-12 15:53	853.6	0.1523111	0.1118132	0.0117052
EARTH	2058-11-20 13:42	587.8	0.0080223	0.0003085	0.0045093
MARS	2067-01-20 02:53	> 1 d	0.0410745	0.0060563	0.1749404
EARTH	2072-06-27 13:01	> 1 mo	0.0500173	0.0171111	0.3113668
EARTH	2084-11-29 09:41	> 1 d	0.1585045	0.0002107	0.1232562
MARS	2089-08-15 05:28	> 1 d	0.0110940	0.0106888	0.0001343
EARTH	2091-10-15 14:12	> 1 w	0.1817093	0.1327457	0.0141263
EARTH	2098-07-27 13:60	> 1 mo	0.1779643	0.0001216	0.0879415
EARTH	2105-06-12 18:09	> 1 w	0.1910766	0.0173054	0.2742474
EARTH	2117-10-17 02:19	> 1 mo	0.1800996	0.0000297	0.4162343

Download as:

2015WP2

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2077-11-20.137	79992.138	4.297	1.17 ± 0.005	7.63E5	6.51E-11	1.05E-13	-12.69
2080-11-19.626	81087.627	-1.453	1.07 ± 0.003	6.60E5	5.51E-7	8.84E-10	-8.78
2081-11-19.813	81452.813	-1.407	1.32 ± 0.003	3.51E6	6.05E-8	9.69E-11	-9.75
2082-11-20.352	81818.353	-2.097	0.72 ± 0.003	7.54E3	1.54E-5	2.47E-8	-7.35
2082-11-20.380	81818.380	-2.062	1.21 ± 0.002	1.19E4	7.27E-6	1.16E-8	-7.68
2083-11-20.270	82183.271	-1.422	0.78 ± 0.008	6.78E7	4.86E-9	7.79E-12	-10.86
2085-11-20.116	82914.116	-2.061	1.04 ± 0.003	7.09E7	1.23E-9	1.97E-12	-11.47
2089-11-19.683	84374.684	-1.616	0.99 ± 0.009	9.26E4	3.05E-6	4.89E-9	-8.10
2089-11-19.926	84374.927	1.836	0.98 ± 0.004	4.71E3	2.86E-5	4.59E-8	-7.13
2089-11-20.090	84375.091	-2.082	0.88 ± 0.002	6.80E5	1.63E-7	2.61E-10	-9.37
2089-11-20.101	84375.101	-2.072	0.79 ± 0.003	7.90E5	1.27E-7	2.03E-10	-9.48
2089-11-20.176	84375.176	4.275	1.01 ± 0.001	1.54E5	5.24E-10	8.43E-13	-11.86
2090-11-20.547	84740.548	-2.789	1.31 ± 0.002	5.70E5	3.06E-8	4.89E-11	-10.10
2091-11-20.476	85105.476	0.619	1.31 ± 0.005	1.82E8	3.35E-9	5.38E-12	-11.07
2094-11-20.224	86201.224	1.845	0.27 ± 0.004	2.48E6	7.66E-8	1.23E-10	-9.73
2095-11-20.447	86566.448	-1.448	1.15 ± 0.000	2.86E8	7.07E-10	1.13E-12	-11.77
2095-11-20.662	86566.663	-2.617	1.28 ± 0.052	1.03E8	8.64E-11	1.38E-13	-12.68
2096-11-19.470	86931.470	-1.617	0.64 ± 0.008	1.09E7	2.32E-8	3.72E-11	-10.26
2096-11-19.719	86931.720	1.817	0.22 ± 0.004	8.52E5	2.37E-7	3.80E-10	-9.25
2098-11-20.256	87662.256	-1.366	0.10 ± 0.000	5.06E7	8.27E-9	1.33E-11	-10.71
2098-11-20.315	87662.315	1.829	1.29 ± 0.004	8.44E6	6.28E-9	1.01E-11	-10.83
2100-11-20.694	88392.695	-1.445	1.04 ± 0.003	1.35E7	2.07E-8	3.31E-11	-10.33
2100-11-20.857	88392.857	0.613	1.17 ± 0.003	1.28E7	3.33E-8	5.34E-11	-10.12
2101-11-21.171	88758.172	-1.561	1.32 ± 0.004	2.05E7	3.90E-9	6.23E-12	-11.06
2101-11-21.213	88758.214	1.919	1.21 ± 0.000	5.54E4	1.28E-6	2.05E-9	-8.54
2104-11-20.700	89853.701	-1.462	1.09 ± 0.003	2.64E7	1.13E-8	1.81E-11	-10.61
2105-11-21.101	90219.101	1.826	0.93 ± 0.006	1.04E7	1.41E-8	2.26E-11	-10.52
2106-11-21.327	90584.327	1.860	0.49 ± 0.005	1.39E6	1.27E-7	2.03E-10	-9.57
2106-11-21.504	90584.505	0.635	0.71 ± 0.013	3.86E7	1.92E-8	3.08E-11	-10.39
2107-11-21.533	90949.534	1.842	0.60 ± 0.004	1.81E7	9.75E-9	1.57E-11	-10.69
2107-11-21.596	90949.596	-1.435	1.05 ± 0.000	1.02E8	2.33E-9	3.74E-12	-11.31
2109-11-21.256	91680.257	-2.107	0.71 ± 0.003	8.11E6	1.21E-8	1.94E-11	-10.60
2111-11-21.582	92410.583	-1.405	0.78 ± 0.006	4.57E7	7.69E-9	1.23E-11	-10.81
2111-11-22.041	92411.042	-2.877	1.32 ± 0.004	3.45E6	1.15E-9	1.84E-12	-11.64
2114-11-21.542	93506.543	-3.311	0.91 ± 0.028	2.55E5	1.27E-8	2.03E-11	-10.61
2115-11-21.685	93871.686	0.662	1.29 ± 0.000	3.04E7	7.27E-9	1.17E-11	-10.85
2115-11-21.876	93871.876	-2.014	0.78 ± 0.004	2.25E7	5.38E-9	8.62E-12	-10.98
2115-11-21.905	93871.905	4.592	0.55 ± 0.008	3.67E5	6.98E-11	1.12E-13	-12.87
2116-11-20.988	94236.988	0.625	0.22 ± 0.000	1.38E8	6.33E-9	1.02E-11	-10.92
2116-11-21.126	94237.126	-3.245	0.77 ± 0.022	1.32E6	3.42E-9	5.48E-12	-11.18
2119-11-21.623	95332.623	-1.380	1.11 ± 0.004	4.20E6	5.44E-8	8.71E-11	-9.99
2119-11-22.244	95333.245	-4.679	0.58 ± 0.021	2.52E5	6.71E-11	1.07E-13	-12.90


Based on 40 optical observations (of which 0 are rejected as outliers) from 2015/11/21.196 to 2015/11/23.204.
Coordinates are given on the Target Plane
Unit is one Earth radius, but impact cross section has radius between 1.33 and 1.34 Earth radii
Coordinates for LOV = EQU scaled= 1 second= F
AstOD software version= 2.0, Date of computation=20200115 190349.139 CET

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