| 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) |
| 2026-05-12 00:00 |
09:07:06.25 |
-79:05:43.3 |
HIP 45071 |
18.90 |
| 2026-05-12 12:00 |
09:07:07.10 |
-79:05:17.3 |
HIP 45071 |
19.25 |
| 2026-05-13 00:00 |
09:07:08.02 |
-79:04:51.4 |
HIP 45071 |
19.59 |
| 2026-05-13 12:00 |
09:07:09.02 |
-79:04:25.6 |
HIP 45071 |
19.94 |
| 2026-05-14 00:00 |
09:07:10.08 |
-79:03:59.7 |
HIP 45071 |
20.28 |
| 2026-05-14 12:00 |
09:07:11.22 |
-79:03:33.9 |
HIP 45071 |
20.63 |
| 2026-05-15 00:00 |
09:07:12.43 |
-79:03:08.1 |
HIP 45071 |
20.98 |
| 2026-05-15 12:00 |
09:07:13.71 |
-79:02:42.3 |
HIP 45071 |
21.33 |
| 2026-05-16 00:00 |
09:07:15.07 |
-79:02:16.5 |
HIP 45071 |
21.68 |
| 2026-05-16 12:00 |
09:07:16.49 |
-79:01:50.8 |
HIP 45071 |
22.04 |
| 2026-05-17 00:00 |
09:07:17.99 |
-79:01:25.2 |
HIP 45071 |
22.39 |
| 2026-05-17 12:00 |
09:07:19.56 |
-79:00:59.5 |
HIP 45071 |
22.74 |
| 2026-05-18 00:00 |
09:07:21.19 |
-79:00:33.9 |
HIP 45071 |
23.10 |
| 2026-05-18 12:00 |
09:07:22.90 |
-79:00:08.4 |
HIP 45071 |
23.45 |
| 2026-05-19 00:00 |
09:07:24.68 |
-78:59:42.9 |
HIP 45071 |
23.81 |
| 2026-05-19 12:00 |
09:07:26.52 |
-78:59:17.4 |
HIP 45071 |
24.17 |
| 2026-05-20 00:00 |
09:07:28.44 |
-78:58:52.0 |
HIP 45071 |
24.52 |
| 2026-05-20 12:00 |
09:07:30.42 |
-78:58:26.6 |
HIP 45071 |
24.88 |
| 2026-05-21 00:00 |
09:07:32.48 |
-78:58:01.3 |
HIP 45071 |
25.24 |
| 2026-05-21 12:00 |
09:07:34.60 |
-78:57:36.0 |
HIP 45071 |
25.60 |
| 2026-05-22 00:00 |
09:07:36.79 |
-78:57:10.8 |
HIP 45071 |
25.95 |
| 2026-05-22 12:00 |
09:07:39.04 |
-78:56:45.6 |
HIP 45071 |
26.31 |
| 2026-05-23 00:00 |
09:07:41.36 |
-78:56:20.6 |
HIP 45071 |
26.67 |
| 2026-05-23 12:00 |
09:07:43.75 |
-78:55:55.5 |
HIP 45071 |
27.03 |
| 2026-05-24 00:00 |
09:07:46.21 |
-78:55:30.5 |
HIP 45071 |
27.39 |
| 2026-05-24 12:00 |
09:07:48.73 |
-78:55:05.6 |
HIP 45071 |
27.75 |
| 2026-05-25 00:00 |
09:07:51.32 |
-78:54:40.8 |
HIP 45071 |
28.11 |
| 2026-05-25 12:00 |
09:07:53.97 |
-78:54:16.0 |
HIP 45071 |
28.47 |
| 2026-05-26 00:00 |
09:07:56.69 |
-78:53:51.3 |
HIP 45071 |
28.82 |
| 2026-05-26 12:00 |
09:07:59.47 |
-78:53:26.6 |
HIP 45071 |
29.18 |
| 2026-05-27 00:00 |
09:08:02.31 |
-78:53:02.1 |
HIP 45071 |
29.54 |
| 2026-05-27 12:00 |
09:08:05.22 |
-78:52:37.5 |
HIP 45071 |
29.90 |
| 2026-05-28 00:00 |
09:08:08.19 |
-78:52:13.1 |
HIP 45071 |
30.26 |
| 2026-05-28 12:00 |
09:08:11.23 |
-78:51:48.8 |
HIP 45071 |
30.62 |
| 2026-05-29 00:00 |
09:08:14.33 |
-78:51:24.5 |
HIP 45071 |
30.98 |
| 2026-05-29 12:00 |
09:08:17.49 |
-78:51:00.3 |
HIP 45071 |
31.34 |
| 2026-05-30 00:00 |
09:08:20.71 |
-78:50:36.2 |
HIP 45071 |
31.69 |
| 2026-05-30 12:00 |
09:08:24.00 |
-78:50:12.1 |
HIP 45071 |
32.05 |
| 2026-05-31 00:00 |
09:08:27.34 |
-78:49:48.2 |
HIP 45071 |
32.41 |
| 2026-05-31 12:00 |
09:08:30.75 |
-78:49:24.3 |
HIP 45071 |
32.77 |
| 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 |