| Parameter |
Value |
| Designation |
C/1983 J1 (Sugano-Saigusa-Fujikawa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1983-05-01T07:52:43.495680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:29Z |
| Obs used |
55 |
| NEO |
- |
| M1 |
12.200 |
| K1 |
15.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1983-05-15.0000000 |
| e |
0.99990155 |
| q (au) |
0.471084 |
| a (au) |
4784.905650 |
| i (deg) |
96.622884 |
| Ω (om, deg) |
83.039467 |
| ω (w, deg) |
82.173450 |
| M (ma, deg) |
0.000041 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.814 + 5.498\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.814 |
| n |
5.498 |
| gf |
0.800 |
| gb |
-0.678 |
| k |
0.974 |
| δ90 |
1.000 |
| 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 |
09:08:34.22 |
-78:49:00.5 |
HIP 45071 |
33.12 |
| 2026-06-01 12:00 |
09:08:37.74 |
-78:48:36.8 |
HIP 45071 |
33.48 |
| 2026-06-02 00:00 |
09:08:41.33 |
-78:48:13.2 |
HIP 45071 |
33.84 |
| 2026-06-02 12:00 |
09:08:44.98 |
-78:47:49.6 |
HIP 45071 |
34.19 |
| 2026-06-03 00:00 |
09:08:48.69 |
-78:47:26.2 |
HIP 45071 |
34.55 |
| 2026-06-03 12:00 |
09:08:52.45 |
-78:47:02.9 |
HIP 45619 |
34.20 |
| 2026-06-04 00:00 |
09:08:56.28 |
-78:46:39.6 |
HIP 45619 |
33.81 |
| 2026-06-04 12:00 |
09:09:00.16 |
-78:46:16.5 |
HIP 45619 |
33.43 |
| 2026-06-05 00:00 |
09:09:04.10 |
-78:45:53.4 |
HIP 45619 |
33.05 |
| 2026-06-05 12:00 |
09:09:08.10 |
-78:45:30.4 |
HIP 45619 |
32.66 |
| 2026-06-06 00:00 |
09:09:12.15 |
-78:45:07.6 |
HIP 45619 |
32.28 |
| 2026-06-06 12:00 |
09:09:16.26 |
-78:44:44.8 |
HIP 45619 |
31.89 |
| 2026-06-07 00:00 |
09:09:20.43 |
-78:44:22.2 |
HIP 45619 |
31.51 |
| 2026-06-07 12:00 |
09:09:24.66 |
-78:43:59.6 |
HIP 45619 |
31.12 |
| 2026-06-08 00:00 |
09:09:28.94 |
-78:43:37.2 |
HIP 45619 |
30.74 |
| 2026-06-08 12:00 |
09:09:33.28 |
-78:43:14.8 |
HIP 45619 |
30.35 |
| 2026-06-09 00:00 |
09:09:37.67 |
-78:42:52.6 |
HIP 45619 |
29.97 |
| 2026-06-09 12:00 |
09:09:42.11 |
-78:42:30.5 |
HIP 45619 |
29.58 |
| 2026-06-10 00:00 |
09:09:46.61 |
-78:42:08.4 |
HIP 45619 |
29.20 |
| 2026-06-10 12:00 |
09:09:51.17 |
-78:41:46.5 |
HIP 45619 |
28.81 |
| 2026-06-11 00:00 |
09:09:55.78 |
-78:41:24.8 |
HIP 45619 |
28.42 |
| 2026-06-11 12:00 |
09:10:00.44 |
-78:41:03.1 |
HIP 45619 |
28.04 |
| 2026-06-12 00:00 |
09:10:05.16 |
-78:40:41.5 |
HIP 45619 |
27.65 |
| 2026-06-12 12:00 |
09:10:09.92 |
-78:40:20.1 |
HIP 45619 |
27.26 |
| 2026-06-13 00:00 |
09:10:14.74 |
-78:39:58.8 |
HIP 45619 |
26.88 |
| 2026-06-13 12:00 |
09:10:19.62 |
-78:39:37.6 |
HIP 45619 |
26.49 |
| 2026-06-14 00:00 |
09:10:24.54 |
-78:39:16.5 |
HIP 45619 |
26.10 |
| 2026-06-14 12:00 |
09:10:29.51 |
-78:38:55.6 |
HIP 45619 |
25.71 |
| 2026-06-15 00:00 |
09:10:34.54 |
-78:38:34.7 |
HIP 45619 |
25.33 |
| 2026-06-15 12:00 |
09:10:39.61 |
-78:38:14.0 |
HIP 45619 |
24.94 |
| 2026-06-16 00:00 |
09:10:44.74 |
-78:37:53.5 |
HIP 45619 |
24.55 |
| 2026-06-16 12:00 |
09:10:49.91 |
-78:37:33.0 |
HIP 45619 |
24.17 |
| 2026-06-17 00:00 |
09:10:55.14 |
-78:37:12.7 |
HIP 45619 |
23.78 |
| 2026-06-17 12:00 |
09:11:00.41 |
-78:36:52.6 |
HIP 45619 |
23.39 |
| 2026-06-18 00:00 |
09:11:05.73 |
-78:36:32.5 |
HIP 45619 |
23.00 |
| 2026-06-18 12:00 |
09:11:11.09 |
-78:36:12.6 |
HIP 45619 |
22.62 |
| 2026-06-19 00:00 |
09:11:16.51 |
-78:35:52.9 |
HIP 45619 |
22.23 |
| 2026-06-19 12:00 |
09:11:21.97 |
-78:35:33.2 |
HIP 45619 |
21.84 |
| 2026-06-20 00:00 |
09:11:27.47 |
-78:35:13.7 |
HIP 45619 |
21.46 |
| 2026-06-20 12:00 |
09:11:33.02 |
-78:34:54.4 |
HIP 45619 |
21.07 |
| 2026-06-21 00:00 |
09:11:38.62 |
-78:34:35.2 |
HIP 45619 |
20.68 |
| 2026-06-21 12:00 |
09:11:44.26 |
-78:34:16.1 |
HIP 45619 |
20.30 |
| 2026-06-22 00:00 |
09:11:49.95 |
-78:33:57.2 |
HIP 45619 |
19.91 |