Asteroids around opposition

Charts show 1 month either side of opposition and are tabulated in order of opposition date. Positions are calculated from the latest osculating elements given in the Minor Planet Center's database. Star data are from the Hipparcos/Tycho databases.

Our aim is to provide charts for all minor planets that reach magnitude 12.0 or brighter at opposition (as estimated from G and H parameters*). A chart for any object at any one date & time can also be plotted from our "What's observable" applet.

The following table gives data at opposition. An asterisk after an object's name means that an ephemeris may be found in the printed Handbook.

The charts are interactive, to assist magnitude estimation. Green boxes indicate stars with a colour index similar to the Sun (0.60 < B - V < 0.72). For further explanation see the comet charts page.

NEW (2013 Dec 2) Starting with 1021 Flammario the charts have ephemeris data built in too. If the cursor is moved along the track of an asteroid, data for 0h UT on every day appear in blue. You may need to refresh your browser's cache (Ctrl-F5 in Windows) on a chart to get the latest script file.

* Magnitude estimates are based on H, G, r, Δ and phase angle. The theory behind this was explained in "The H and G magnitude system for asteroids" by Roger Dymock in the BAA Journal: J.Br.Astron.Assoc. 117,6,2007 p.342.

Historical

The following may be of interest to those requiring older confrmation data.

Link to chartOpposition
(UT)
MagDec
(°)
r
(AU)
Δ
(AU)
Phase
(°)
Speed1
(°/hr)
6 Hebe*2014-Nov-15 17h8.05-8.892.001.0713.570.0096
8 Flora2015-Feb-15 10h9.05+18.452.271.282.620.0119
354 Eleonora2015-Mar-05 14h9.64+17.882.491.515.060.0113
511 Davida2015-Mar-18 00h11.77-1.372.981.990.950.0085
113 Amalthea2015-Sep-11 01h11.89-10.202.531.532.310.0104
45 Eugenia2015-Sep-16 15h11.21-6.772.801.801.590.0094
250 Bettina2016-Feb-03 18h11.6134.182.781.836.440.0087

Current

The following are future Oppositions.

Link to chartOpposition
(UT)
MagDec
(°)
r
(AU)
Δ
(AU)
Phase
(°)
Speed1
(°/hr)
38 Leda2018-Dec-01 02h11.2730.352.371.393.610.0097
397 Vienna2018-Dec-01 17h11.8413.402.211.233.780.0115
124 Alkeste2018-Dec-03 01h11.8718.042.821.841.400.0098
128 Nemesis2018-Dec-04 05h10.4721.392.501.520.310.0099
433 Eros2018-Dec-07 20h9.6461.671.200.2731.250.0092
40 Harmonia2018-Dec-08 19h9.3720.422.231.241.020.0114
80 Sappho2018-Dec-10 15h10.3412.672.131.154.720.0117
455 Bruchsalia2018-Dec-11 10h11.6924.042.421.430.430.0116
241 Germania2018-Dec-13 05h11.6124.473.012.030.440.0090
354 Eleonora2018-Dec-14 04h10.16-1.632.631.719.020.0097
71 Niobe2018-Dec-19 08h11.8049.423.072.158.080.0098
776 Berbericia2018-Dec-21 19h11.0928.592.651.671.900.0111
6 Hebe2018-Dec-28 02h8.445.392.221.267.830.0120
24 Themis2019-Jan-14 01h10.6622.542.781.800.400.0087
704 Interamnia2019-Jan-14 21h10.2515.073.062.082.010.0098
270 Anahita2019-Jan-18 18h11.6717.852.441.451.100.0117
449 Hamburga2019-Jan-20 05h11.5723.352.111.131.480.0099
324 Bamberga2019-Jan-21 01h10.3728.052.641.663.040.0111
89 Julia2019-Jan-30 23h10.2218.042.821.830.160.0112
159 Aemilia2019-Jan-31 08h11.6916.982.791.800.180.0090
65 Cybele2019-Feb-04 18h11.6014.593.602.610.460.0079
532 Herculina2019-Feb-06 03h8.8628.862.391.425.620.0112
48 Doris2019-Feb-08 19h11.058.502.992.012.230.0087
42 Isis2019-Feb-13 13h11.7623.772.982.003.620.0103
129 Antigone2019-Feb-17 11h10.8015.982.821.841.450.0101
92 Undina2019-Feb-19 21h11.6620.993.512.532.930.0082
488 Kreusa2019-Feb-27 08h11.5824.632.661.706.410.0085
349 Dembowska2019-Feb-27 15h10.2717.413.112.133.080.0089
64 Angelina2019-Mar-02 18h10.356.092.381.390.490.0096
451 Patientia2019-Mar-10 00h11.2524.373.092.156.850.0084
53 Kalypso2019-Mar-13 19h11.646.872.381.391.790.0102
110 Lydia2019-Mar-16 13h11.869.072.941.952.660.0093
337 Devosa2019-Mar-17 03h11.131.472.291.300.050.0112
385 Ilmatar2019-Mar-17 17h10.60-2.862.501.501.820.0104
59 Elpis2019-Mar-18 14h11.932.553.002.000.550.0096
111 Ate2019-Mar-21 23h11.12-6.512.471.482.710.0099
17 Thetis2019-Mar-22 10h10.666.802.371.383.320.0104

1 The speed column shows apparent speed across the sky at opposition. This should assist photographers to determine how frequently to take frames to obtain a trail (knowing pixels per degree in their telescope/camera configuration).

next to a chart provides a link to a red-on-black version, for display while observing.

 

Section Director
Steve Harvey

Section Director, Steve Harvey

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