| Parameter |
Value |
| Designation |
C/1932 M2 (Geddes) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1932-09-20T21:14:07.022400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:05Z |
| Obs used |
15 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1933-04-05.0000000 |
| e |
0.99929446 |
| q (au) |
2.312627 |
| a (au) |
3277.828381 |
| i (deg) |
124.976898 |
| Ω (om, deg) |
216.080116 |
| ω (w, deg) |
329.630678 |
| M (ma, deg) |
0.001030 |
Magnitude
Scatter + Global Linear
$$
M_a = (3.349 + 3.145\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
3.349 |
| n |
3.145 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
03:41:18.79 |
+56:55:23.3 |
HIP 16974 |
24.44 |
| 2026-06-01 12:00 |
03:41:20.56 |
+56:55:27.8 |
HIP 16974 |
24.68 |
| 2026-06-02 00:00 |
03:41:22.33 |
+56:55:32.3 |
HIP 16974 |
24.92 |
| 2026-06-02 12:00 |
03:41:24.09 |
+56:55:36.9 |
HIP 16974 |
25.16 |
| 2026-06-03 00:00 |
03:41:25.85 |
+56:55:41.5 |
HIP 16974 |
25.39 |
| 2026-06-03 12:00 |
03:41:27.61 |
+56:55:46.2 |
HIP 16974 |
25.63 |
| 2026-06-04 00:00 |
03:41:29.37 |
+56:55:51.0 |
HIP 16974 |
25.87 |
| 2026-06-04 12:00 |
03:41:31.12 |
+56:55:55.9 |
HIP 16974 |
26.11 |
| 2026-06-05 00:00 |
03:41:32.86 |
+56:56:00.8 |
HIP 16974 |
26.35 |
| 2026-06-05 12:00 |
03:41:34.60 |
+56:56:05.8 |
HIP 16974 |
26.58 |
| 2026-06-06 00:00 |
03:41:36.34 |
+56:56:10.9 |
HIP 16974 |
26.82 |
| 2026-06-06 12:00 |
03:41:38.08 |
+56:56:16.0 |
HIP 16974 |
27.06 |
| 2026-06-07 00:00 |
03:41:39.80 |
+56:56:21.2 |
HIP 16974 |
27.29 |
| 2026-06-07 12:00 |
03:41:41.53 |
+56:56:26.5 |
HIP 16974 |
27.53 |
| 2026-06-08 00:00 |
03:41:43.25 |
+56:56:31.8 |
HIP 16974 |
27.77 |
| 2026-06-08 12:00 |
03:41:44.96 |
+56:56:37.2 |
HIP 16974 |
28.00 |
| 2026-06-09 00:00 |
03:41:46.67 |
+56:56:42.7 |
HIP 16974 |
28.24 |
| 2026-06-09 12:00 |
03:41:48.38 |
+56:56:48.2 |
HIP 16974 |
28.47 |
| 2026-06-10 00:00 |
03:41:50.07 |
+56:56:53.8 |
HIP 16974 |
28.70 |
| 2026-06-10 12:00 |
03:41:51.77 |
+56:56:59.4 |
HIP 16974 |
28.94 |
| 2026-06-11 00:00 |
03:41:53.46 |
+56:57:05.2 |
HIP 16974 |
29.17 |
| 2026-06-11 12:00 |
03:41:55.14 |
+56:57:10.9 |
HIP 16974 |
29.40 |
| 2026-06-12 00:00 |
03:41:56.82 |
+56:57:16.8 |
HIP 16974 |
29.64 |
| 2026-06-12 12:00 |
03:41:58.49 |
+56:57:22.7 |
HIP 16974 |
29.87 |
| 2026-06-13 00:00 |
03:42:00.15 |
+56:57:28.7 |
HIP 16974 |
30.10 |
| 2026-06-13 12:00 |
03:42:01.81 |
+56:57:34.7 |
HIP 16974 |
30.33 |
| 2026-06-14 00:00 |
03:42:03.46 |
+56:57:40.8 |
HIP 16974 |
30.56 |
| 2026-06-14 12:00 |
03:42:05.11 |
+56:57:47.0 |
HIP 16974 |
30.79 |
| 2026-06-15 00:00 |
03:42:06.75 |
+56:57:53.2 |
HIP 16974 |
31.02 |
| 2026-06-15 12:00 |
03:42:08.38 |
+56:57:59.4 |
HIP 16974 |
31.24 |
| 2026-06-16 00:00 |
03:42:10.01 |
+56:58:05.8 |
HIP 16974 |
31.47 |
| 2026-06-16 12:00 |
03:42:11.63 |
+56:58:12.2 |
HIP 16974 |
31.70 |
| 2026-06-17 00:00 |
03:42:13.24 |
+56:58:18.6 |
HIP 16974 |
31.92 |
| 2026-06-17 12:00 |
03:42:14.85 |
+56:58:25.1 |
HIP 16974 |
32.15 |
| 2026-06-18 00:00 |
03:42:16.45 |
+56:58:31.7 |
HIP 16974 |
32.38 |
| 2026-06-18 12:00 |
03:42:18.04 |
+56:58:38.3 |
HIP 16974 |
32.60 |
| 2026-06-19 00:00 |
03:42:19.62 |
+56:58:45.0 |
HIP 16974 |
32.82 |
| 2026-06-19 12:00 |
03:42:21.20 |
+56:58:51.8 |
HIP 16974 |
33.05 |
| 2026-06-20 00:00 |
03:42:22.76 |
+56:58:58.5 |
HIP 16974 |
33.27 |
| 2026-06-20 12:00 |
03:42:24.33 |
+56:59:05.4 |
HIP 16974 |
33.49 |
| 2026-06-21 00:00 |
03:42:25.88 |
+56:59:12.3 |
HIP 16974 |
33.71 |
| 2026-06-21 12:00 |
03:42:27.42 |
+56:59:19.3 |
HIP 16974 |
33.93 |
| 2026-06-22 00:00 |
03:42:28.96 |
+56:59:26.3 |
HIP 16974 |
34.15 |