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)
505 Cava2017-Sep-18 00h11.80-17.482.351.377.150.0096
344 Desiderata2017-Sep-19 17h10.78-25.892.111.1612.450.0120
377 Campania2017-Dec-05 07h12.0914.902.491.512.950.0098
704 Interamnia2017-Oct-01 18h9.9228.512.581.6510.330.0081
264 Libussa2017-Oct-05 12h11.52-5.132.421.444.420.0096
71 Niobe2017-Oct-06 10h11.9731.133.152.248.690.0091
186 Celuta2017-Oct-07 20h10.705.582.081.080.060.0126
364 Isara2017-Oct-19 01h11.64-1.441.920.946.240.0104
364 Isara2017-Oct-19 01h11.64-1.441.920.946.240.0104
64 Angelina2017-Oct-21 18h11.0512.762.691.700.750.0097
554 Peraga2017-Oct-25 09h11.1617.432.041.052.740.0102
758 Mancunia2017-Oct-26 17h11.894.682.751.763.010.0084
2 Pallas2017-Oct-29 00h8.16-23.952.541.6914.400.0123
7 Iris2017-Oct-30 00h6.8621.411.830.844.410.0096
111 Ate2017-Nov-02 20h11.2022.652.481.503.240.0099
532 Herculina2017-Nov-02 23h10.43-5.843.132.196.760.0092
44 Nysa2017-Nov-03 06h9.558.822.271.282.840.0105
48 Doris2017-Nov-08 02h10.9010.142.911.922.250.0087
134 Sophrosyne2017-Nov-09 22h11.6134.102.281.317.650.0100
236 Honoria2017-Nov-10 15h11.238.722.391.403.650.0096
42 Isis2017-Nov-17 08h10.3711.992.351.363.020.0114
211 Isolda2017-Nov-25 03h11.0622.922.561.570.860.0089
385 Ilmatar2017-Nov-27 00h11.7940.632.911.976.620.0091
349 Dembowska2017-Dec-01 13h9.5629.512.741.762.780.0093
478 Tergeste2017-Dec-09 19h11.8214.602.801.822.900.0096
17 Thetis2017-Dec-10 20h11.5416.682.791.812.200.0104
3200 Phaethon2017-Dec-11 09h11.2545.141.090.1219.790.2273
451 Patientia2017-Dec-11 14h10.4319.002.831.851.390.0099
65 Cybele2017-Dec-13 00h11.9818.503.802.821.190.0077
59 Elpis2017-Dec-13 10h11.349.102.521.555.440.0096

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

Contact Steve

This year's Handbook

New handbook 2018

Next year's Handbook