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.


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

Link to chartOpposition
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


The following are future Oppositions.

Link to chartOpposition
20 Massalia2016-Aug-01 09h9.87-16.862.701.680.410.0101
19 Fortuna2016-Aug-10 09h9.63-12.892.
349 Dembowska2016-Aug-11 18h9.67-26.782.771.774.500.0086
85 Io2016-Aug-12 00h10.
48 Doris2016-Aug-14 01h11.36-
56 Melete2016-Aug-14 20h10.34-
24 Themis2016-Aug-16 03h11.89-14.653.532.510.280.0079
437 Rhodia2016-Aug-18 00h11.750.821.790.798.270.0082
751 Faina2016-Aug-19 07h11.82-36.332.281.3310.960.0095
2 Pallas2016-Aug-20 13h9.199.883.352.406.920.0107
433 Eros2016-Aug-22 02h11.97-1.461.730.726.380.0192
521 Brixia2016-Aug-22 14h11.50-26.492.351.366.790.0098
532 Herculina2016-Aug-23 11h10.36-26.633.
17 Thetis2016-Aug-24 02h10.40-15.082.321.311.860.0101
372 Palma2016-Aug-26 05h11.92-6.903.
110 Lydia2016-Aug-26 14h11.03-19.402.511.513.950.0090
670 Ottegebe2016-Sep-04 05h11.95-4.352.301.291.310.0094
451 Patientia2016-Sep-05 18h11.10-26.543.
185 Eunike2016-Sep-08 07h10.65-13.592.421.423.600.0129
385 Ilmatar2016-Sep-11 19h11.81-2.923.192.190.460.0093
31 Euphrosyne2016-Sep-11 20h11.60-
67 Asia2016-Sep-13 06h10.
322 Phaeo2016-Sep-19 15h11.3812.312.
984 Gretia2016-Sep-19 22h11.729.
92 Undina2016-Sep-22 20h10.71-13.632.871.885.140.0082
550 Senta2016-Sep-27 07h11.9518.862.141.168.640.0093
11 Parthenope2016-Sep-29 14h9.16-
487 Venetia2016-Sep-30 21h11.44-11.962.451.476.620.0093
117 Lomia2016-Oct-01 07h11.9810.352.921.922.630.0095
32 Pomona2016-Oct-05 07h11.258.582.791.791.450.0098
341 California2016-Oct-09 08h11.893.901.890.891.400.0113
163 Erigone2016-Oct-09 11h11.961.652.221.222.310.0109
129 Antigone2016-Oct-11 11h11.65-7.443.192.224.880.0089
51 Nemausa2016-Oct-13 19h10.561.612.511.512.750.0110
91 Aegina2016-Oct-16 16h11.629.852.431.430.320.0099
57 Mnemosyne2016-Oct-19 00h10.737.392.811.820.970.0097
737 Arequipa2016-Oct-19 21h11.372.382.231.243.750.0112
65 Cybele2016-Oct-20 04h11.726.813.642.641.040.0077
1 Ceres2016-Oct-21 06h7.43-1.212.871.904.390.0094
345 Tercidina2016-Oct-22 15h11.0212.
308 Polyxo2016-Oct-23 17h11.758.552.751.751.180.0094
18 Melpomene2016-Oct-24 00h7.97-6.461.800.8310.560.0096
444 Gyptis2016-Oct-26 21h10.667.572.371.382.280.0102
313 Chaldaea2016-Oct-31 19h11.831.432.321.345.770.0115
79 Eurynome2016-Nov-03 18h9.5613.021.970.981.190.0100
234 Barbara2016-Nov-05 20h11.59-
194 Prokne2016-Nov-19 19h11.42-8.792.521.6110.960.0099
287 Nephthys2016-Nov-24 02h11.464.212.401.446.750.0107
60 Echo2016-Nov-27 10h10.0515.602.011.032.770.0104
814 Tauris2016-Dec-01 04h11.688.752.321.355.560.0129
193 Ambrosia2016-Dec-06 00h11.5147.441.830.8913.240.0080
34 Circe2016-Dec-07 06h11.9614.342.601.633.130.0098
72 Feronia2016-Dec-10 07h11.9215.902.411.432.870.0114
45 Eugenia2016-Dec-11 20h11.5813.892.921.943.080.0095
360 Carlova2016-Dec-17 01h11.859.192.501.535.520.0094
68 Leto2016-Dec-20 23h10.6332.202.771.803.090.0098
22 Kalliope2016-Dec-26 23h10.0534.102.661.693.960.0100
323 Brucia2016-Dec-29 16h11.2223.891.960.970.350.0189
135 Hertha2016-Dec-31 08h11.7926.292.731.741.160.0107

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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