| Parameter |
Value |
| Designation |
D/1978 R1 (Haneda-Campos) |
| Type |
D |
| Perihelion (tp_cal, UTC) |
1978-10-09T11:47:52.676160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:27Z |
| Obs used |
62 |
| NEO |
Yes |
| M1 |
12.800 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1978-09-22.0000000 |
| e |
0.66523727 |
| q (au) |
1.101419 |
| a (au) |
3.290148 |
| i (deg) |
5.947352 |
| Ω (om, deg) |
132.253410 |
| ω (w, deg) |
240.462250 |
| M (ma, deg) |
357.111249 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.164 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.164 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.839 |
| k |
0.800 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
12:21:05.45 |
+02:48:25.7 |
HIP 60264 |
6.73 |
| 2026-05-12 12:00 |
12:20:55.42 |
+02:49:03.7 |
HIP 60264 |
9.05 |
| 2026-05-13 00:00 |
12:20:45.54 |
+02:49:40.5 |
HIP 60264 |
11.44 |
| 2026-05-13 12:00 |
12:20:35.82 |
+02:50:16.1 |
HIP 60264 |
13.84 |
| 2026-05-14 00:00 |
12:20:26.26 |
+02:50:50.7 |
HIP 60264 |
16.23 |
| 2026-05-14 12:00 |
12:20:16.86 |
+02:51:24.0 |
HIP 60264 |
18.59 |
| 2026-05-15 00:00 |
12:20:07.62 |
+02:51:56.2 |
HIP 60264 |
20.91 |
| 2026-05-15 12:00 |
12:19:58.55 |
+02:52:27.3 |
HIP 60264 |
23.20 |
| 2026-05-16 00:00 |
12:19:49.63 |
+02:52:57.2 |
HIP 60264 |
25.45 |
| 2026-05-16 12:00 |
12:19:40.88 |
+02:53:25.9 |
HIP 59998 |
24.01 |
| 2026-05-17 00:00 |
12:19:32.30 |
+02:53:53.5 |
HIP 59998 |
21.95 |
| 2026-05-17 12:00 |
12:19:23.87 |
+02:54:19.9 |
HIP 59998 |
19.98 |
| 2026-05-18 00:00 |
12:19:15.62 |
+02:54:45.2 |
HIP 59998 |
18.08 |
| 2026-05-18 12:00 |
12:19:07.53 |
+02:55:09.3 |
HIP 59998 |
16.28 |
| 2026-05-19 00:00 |
12:18:59.60 |
+02:55:32.2 |
HIP 59998 |
14.60 |
| 2026-05-19 12:00 |
12:18:51.84 |
+02:55:53.9 |
HIP 59998 |
13.04 |
| 2026-05-20 00:00 |
12:18:44.25 |
+02:56:14.5 |
HIP 59998 |
11.66 |
| 2026-05-20 12:00 |
12:18:36.83 |
+02:56:34.0 |
HIP 59998 |
10.48 |
| 2026-05-21 00:00 |
12:18:29.57 |
+02:56:52.3 |
HIP 59998 |
9.56 |
| 2026-05-21 12:00 |
12:18:22.49 |
+02:57:09.4 |
HIP 59998 |
8.95 |
| 2026-05-22 00:00 |
12:18:15.57 |
+02:57:25.3 |
HIP 59998 |
8.69 |
| 2026-05-22 12:00 |
12:18:08.82 |
+02:57:40.1 |
HIP 59998 |
8.78 |
| 2026-05-23 00:00 |
12:18:02.24 |
+02:57:53.8 |
HIP 59998 |
9.19 |
| 2026-05-23 12:00 |
12:17:55.83 |
+02:58:06.3 |
HIP 59918 |
8.48 |
| 2026-05-24 00:00 |
12:17:49.59 |
+02:58:17.7 |
HIP 59918 |
7.38 |
| 2026-05-24 12:00 |
12:17:43.52 |
+02:58:27.9 |
HIP 59918 |
6.48 |
| 2026-05-25 00:00 |
12:17:37.61 |
+02:58:36.9 |
HIP 59918 |
5.86 |
| 2026-05-25 12:00 |
12:17:31.88 |
+02:58:44.9 |
HIP 59918 |
5.55 |
| 2026-05-26 00:00 |
12:17:26.32 |
+02:58:51.6 |
HIP 59918 |
5.59 |
| 2026-05-26 12:00 |
12:17:20.92 |
+02:58:57.3 |
HIP 59918 |
5.93 |
| 2026-05-27 00:00 |
12:17:15.70 |
+02:59:01.8 |
HIP 59918 |
6.50 |
| 2026-05-27 12:00 |
12:17:10.64 |
+02:59:05.2 |
HIP 59918 |
7.23 |
| 2026-05-28 00:00 |
12:17:05.76 |
+02:59:07.4 |
HIP 59918 |
8.04 |
| 2026-05-28 12:00 |
12:17:01.04 |
+02:59:08.6 |
HIP 59918 |
8.91 |
| 2026-05-29 00:00 |
12:16:56.49 |
+02:59:08.6 |
HIP 59918 |
9.79 |
| 2026-05-29 12:00 |
12:16:52.12 |
+02:59:07.5 |
HIP 59918 |
10.67 |
| 2026-05-30 00:00 |
12:16:47.91 |
+02:59:05.2 |
HIP 59918 |
11.55 |
| 2026-05-30 12:00 |
12:16:43.87 |
+02:59:01.9 |
HIP 59918 |
12.40 |
| 2026-05-31 00:00 |
12:16:40.00 |
+02:58:57.5 |
HIP 59918 |
13.24 |
| 2026-05-31 12:00 |
12:16:36.30 |
+02:58:51.9 |
HIP 59918 |
14.04 |
| 2026-06-01 00:00 |
12:16:32.77 |
+02:58:45.3 |
HIP 59918 |
14.81 |
| 2026-06-01 12:00 |
12:16:29.41 |
+02:58:37.5 |
HIP 59918 |
15.55 |
| 2026-06-02 00:00 |
12:16:26.22 |
+02:58:28.6 |
HIP 59918 |
16.25 |