Asteroids

2015XY261 help

Last update: 2025-02-05 09:01 UTC

Orbital Properties

Epoch

60600.0

MJD

Orbit type

Apollo

Perihelion (q)

0.800

Aphelion (Q)

2.189

Eccentricity (e)

0.465

Inclination (i)

1.6

deg

Orbit period (P)

667.4

Earth MOID

0.00166

U parameter

7.1

Next Earth close approach

Date

2025-05-10

Nominal distance (from Earth center)

0.16821

25164434

Maximum Brightness

26.4

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

27.3

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-12-06

Observatory

Pan-STARRS 1, Haleakala

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

60600.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.494659

1-sigma variation

0.000288

Unit

Eccentricity (e)

Value

0.464554

1-sigma variation

0.000128

Unit

Inclination (i)

Value

1.5898

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

86.8945

1-sigma variation

0.0008

Unit

Arg. of Perihelion (ω)

Value

61.9800

1-sigma variation

0.0006

Unit

Mean Anomaly (M)

Value

276.69606

1-sigma variation

0.50688

Unit

Perihelion distance

Value

0.800310

1-sigma variation

Unit

Aphelion distance

Value

2.189008

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.020171

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.482006

1-sigma variation

Unit

MOID

Value

0.001656

1-sigma variation

Unit

Orbit Period

Value

667.4388

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.29707E-8	3.68352E-8	2.24179E-8	2.16840E-7	-1.83112E-7	-1.46006E-4
e	3.68352E-8	1.63532E-8	9.95406E-9	9.62612E-8	-8.12798E-8	-6.48200E-5
i	2.24179E-8	9.95406E-9	6.31402E-9	5.75480E-8	-4.80904E-8	-3.94496E-5
Ω	2.16840E-7	9.62612E-8	5.75480E-8	5.71053E-7	-4.84285E-7	-3.81580E-4
ω	-1.83112E-7	-8.12798E-8	-4.80904E-8	-4.84285E-7	4.13099E-7	3.22228E-4
M	-1.46006E-4	-6.48200E-5	-3.94496E-5	-3.81580E-4	3.22228E-4	2.56931E-1

Date of computation: 2024-12-09 13:46 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

27.347

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

9 - 20*

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

3340

Unit

Source

[1]

Normalized RMS of residuals

Value

0.415098

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-12-06.45988

Unit

Source

[2]

Last Observation

Value

2015-12-15.37345

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

41 (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

Close Approaches for 2015XY261 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	1951-05-03 00:10	> 1 mo	0.0810943	0.0164627	0.7161519
EARTH	1952-12-05 08:09	> 1 mo	0.1230865	0.0025804	0.6925455
EARTH	1964-05-08 21:32	> 1 d	0.1851350	0.0898490	0.0318852
EARTH	1965-12-12 16:55	> 1 d	0.0226876	0.0022151	0.0704892
EARTH	1977-04-25 02:32	> 1 d	0.0237021	0.0165659	0.0144540
EARTH	1990-02-14 04:28	> 1 w	0.1855405	0.1787984	0.0022609
EARTH	2003-01-02 05:49	> 1 d	0.1113493	0.0576437	0.0179176
MARS	2008-12-21 09:33	545.6	0.0407462	0.0289756	0.0076376
EARTH	2015-12-15 13:50	< 1 s	0.0019276	0.0019261	0.0000005
EARTH	2025-05-10 11:14	1290.8	0.1682139	0.1186487	0.0165742
EARTH	2036-04-27 04:08	> 1 d	0.0258149	0.0208899	0.0206627
EARTH	2047-02-25 14:38	> 1 mo	0.1889613	0.1655973	0.0082706
EARTH	2057-12-22 20:11	> 1 mo	0.0635473	0.0021163	0.2169317
EARTH	2068-12-03 04:18	> 1 d	0.1778738	0.0014443	0.0885697
EARTH	2078-04-26 12:11	> 1 d	0.0352859	0.0207974	0.0431913
EARTH	2089-02-18 21:50	> 1 mo	0.1896832	0.1788635	0.0041429
MARS	2097-12-17 22:46	> 1 d	0.0478100	0.0200906	0.1809263
EARTH	2099-12-16 16:47	> 1 w	0.0048445	0.0009757	0.2390757
EARTH	2111-04-19 09:33	> 1 mo	0.0816670	0.0212824	39.1824117
EARTH	2124-01-19 18:00	> 1 mo	0.1518046	0.0144309	33.8271858

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
317.41542355	341.72330809	0.00165404	MINIMUM
45.49099822	115.62851854	0.02091391	MINIMUM
1.91323059	49.25988310	0.18925363	SADDLE
180.66463194	227.74333401	1.17836461	SADDLE
1.79105360	229.04034849	1.81110315	SADDLE
180.61005254	47.70256383	3.17676349	MAXIMUM

Download:

MOID Plots

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