Asteroids

2017DG16 help

Last update: 2024-04-19 00:31 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.949

Aphelion (Q)

1.826

Eccentricity (e)

0.316

Inclination (i)

3.4

deg

Orbit period (P)

597.0

Earth MOID

0.00082

U parameter

6.9

Next Earth close approach

Date

2035-02-10

Nominal distance (from Earth center)

0.10842

16219768

Maximum Brightness

27.2

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

29.5

mag

Diameter

3 - 8*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-02-21

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)
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

1.387526

1-sigma variation

0.000205

Unit

Eccentricity (e)

Value

0.315927

1-sigma variation

0.000111

Unit

Inclination (i)

Value

3.3972

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

335.9864

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

212.9649

1-sigma variation

0.0015

Unit

Mean Anomaly (M)

Value

105.71424

1-sigma variation

0.34325

Unit

Perihelion distance

Value

0.949169

1-sigma variation

Unit

Aphelion distance

Value

1.825884

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.690255

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.002240

1-sigma variation

Unit

MOID

Value

0.000821

1-sigma variation

Unit

Orbit Period

Value

596.9807

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.19208E-8	2.26953E-8	-4.33418E-8	4.63122E-8	2.96820E-7	-7.02798E-5
e	2.26953E-8	1.22870E-8	-2.34646E-8	2.50728E-8	1.60697E-7	-3.80485E-5
i	-4.33418E-8	-2.34646E-8	4.53231E-8	-4.81419E-8	-3.06599E-7	7.26621E-5
Ω	4.63122E-8	2.50728E-8	-4.81419E-8	5.12995E-8	3.27791E-7	-7.76420E-5
ω	2.96820E-7	1.60697E-7	-3.06599E-7	3.27791E-7	2.10333E-6	-4.97617E-4
M	-7.02798E-5	-3.80485E-5	7.26621E-5	-7.76420E-5	-4.97617E-4	1.17823E-1

Date of computation: 2024-02-21 14:29 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

29.459

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

3 - 8*

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 ODIM	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

2611

Unit

Source

[1]

Normalized RMS of residuals

Value

0.554364

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-02-21.23575

Unit

Source

[2]

Last Observation

Value

2017-02-23.803759

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

37 (3)

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 2017DG16 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	1960-02-24 23:52	> 1 d	0.0026544	0.0015090	0.0058953
EARTH	1965-04-15 09:56	> 1 d	0.0517055	0.0447076	0.0030222
EARTH	1970-05-19 05:30	> 1 d	0.0621284	0.0342353	0.0268682
MARS	1994-02-01 04:47	265.1	0.0465709	0.0106157	0.0208947
EARTH	2012-02-06 02:34	548.5	0.1636239	0.1435926	0.0066776
EARTH	2017-02-23 21:07	< 1 s	0.0009196	0.0009188	0.0000003
EARTH	2035-02-10 07:46	> 1 d	0.1084225	0.0373429	0.0237492
EARTH	2048-05-22 18:09	> 1 d	0.0975122	0.0660125	0.0127558
EARTH	2066-05-02 16:21	> 1 d	0.0582050	0.0574280	0.0009974
EARTH	2084-04-04 00:08	> 1 w	0.0617949	0.0556218	0.0064651
EARTH	2102-03-13 06:04	> 1 w	0.0410616	0.0071202	0.0229839
EARTH	2120-04-15 11:49	> 1 mo	0.0628316	0.0626441	0.0036004

Download as:

2017DG16

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2079-02-24.655	80453.655	-4.879	0.99 ± 0.000	9.41E3	9.98E-10	2.23E-12	-11.34
2079-02-24.696	80453.696	3.364	1.38 ± 0.000	2.70E4	1.64E-7	3.69E-10	-9.13
2079-02-24.743	80453.743	3.041	1.79 ± 0.000	7.96E4	8.74E-8	1.96E-10	-9.40
2082-02-24.361	81549.361	3.938	0.84 ± 0.001	2.52E5	2.45E-9	5.52E-12	-10.97
2084-02-25.057	82280.057	1.701	1.96 ± 0.000	1.38E3	5.06E-5	1.14E-7	-6.67
2085-02-24.204	82645.204	4.367	1.97 ± 0.000	5.56E5	3.78E-11	8.51E-14	-12.81
2087-02-24.607	83375.607	-4.631	0.43 ± 0.000	1.27E6	2.70E-11	6.05E-14	-12.97
2088-02-24.846	83740.846	4.433	0.72 ± 0.000	2.04E5	3.95E-10	8.89E-13	-11.81
2090-02-24.429	84471.429	4.242	1.77 ± 0.000	5.80E4	2.50E-9	5.64E-12	-11.02
2105-02-25.221	89950.221	1.852	1.81 ± 0.000	1.60E5	7.60E-7	1.71E-9	-8.62


Based on 37 optical observations (of which 3 are rejected as outliers) from 2017/02/21.236 to 2017/02/23.804.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.99 and 1.99 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20240110 090429.847 UTC.

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