| Parameter |
Value |
| Designation |
C/1916 G1 (Wolf) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1917-06-17T01:46:38.360640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:02Z |
| Obs used |
69 |
| NEO |
- |
| M1 |
5.900 |
| K1 |
15.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1917-05-31.0000000 |
| e |
0.99942183 |
| q (au) |
1.686431 |
| a (au) |
2916.855378 |
| i (deg) |
25.658727 |
| Ω (om, deg) |
184.457341 |
| ω (w, deg) |
120.621111 |
| M (ma, deg) |
359.999893 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.290 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.290 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
07:25:11.07 |
-02:28:27.8 |
HIP 36071 |
17.80 |
| 2026-06-01 12:00 |
07:25:11.79 |
-02:28:25.6 |
HIP 36071 |
17.66 |
| 2026-06-02 00:00 |
07:25:12.51 |
-02:28:23.3 |
HIP 36071 |
17.51 |
| 2026-06-02 12:00 |
07:25:13.24 |
-02:28:21.2 |
HIP 36071 |
17.37 |
| 2026-06-03 00:00 |
07:25:13.98 |
-02:28:19.0 |
HIP 36071 |
17.23 |
| 2026-06-03 12:00 |
07:25:14.71 |
-02:28:17.0 |
HIP 36071 |
17.08 |
| 2026-06-04 00:00 |
07:25:15.45 |
-02:28:14.9 |
HIP 36071 |
16.94 |
| 2026-06-04 12:00 |
07:25:16.20 |
-02:28:13.0 |
HIP 36071 |
16.80 |
| 2026-06-05 00:00 |
07:25:16.95 |
-02:28:11.0 |
HIP 36071 |
16.66 |
| 2026-06-05 12:00 |
07:25:17.71 |
-02:28:09.1 |
HIP 36071 |
16.52 |
| 2026-06-06 00:00 |
07:25:18.47 |
-02:28:07.3 |
HIP 36071 |
16.39 |
| 2026-06-06 12:00 |
07:25:19.23 |
-02:28:05.5 |
HIP 36071 |
16.25 |
| 2026-06-07 00:00 |
07:25:20.00 |
-02:28:03.8 |
HIP 36071 |
16.12 |
| 2026-06-07 12:00 |
07:25:20.78 |
-02:28:02.1 |
HIP 36071 |
15.98 |
| 2026-06-08 00:00 |
07:25:21.55 |
-02:28:00.5 |
HIP 36071 |
15.85 |
| 2026-06-08 12:00 |
07:25:22.33 |
-02:27:58.9 |
HIP 36071 |
15.72 |
| 2026-06-09 00:00 |
07:25:23.12 |
-02:27:57.3 |
HIP 36071 |
15.59 |
| 2026-06-09 12:00 |
07:25:23.91 |
-02:27:55.8 |
HIP 36071 |
15.46 |
| 2026-06-10 00:00 |
07:25:24.70 |
-02:27:54.4 |
HIP 36071 |
15.33 |
| 2026-06-10 12:00 |
07:25:25.50 |
-02:27:53.0 |
HIP 36071 |
15.21 |
| 2026-06-11 00:00 |
07:25:26.30 |
-02:27:51.7 |
HIP 36071 |
15.09 |
| 2026-06-11 12:00 |
07:25:27.11 |
-02:27:50.4 |
HIP 36071 |
14.97 |
| 2026-06-12 00:00 |
07:25:27.92 |
-02:27:49.1 |
HIP 36071 |
14.85 |
| 2026-06-12 12:00 |
07:25:28.73 |
-02:27:48.0 |
HIP 36071 |
14.73 |
| 2026-06-13 00:00 |
07:25:29.55 |
-02:27:46.8 |
HIP 36071 |
14.62 |
| 2026-06-13 12:00 |
07:25:30.37 |
-02:27:45.7 |
HIP 36071 |
14.51 |
| 2026-06-14 00:00 |
07:25:31.19 |
-02:27:44.7 |
HIP 36071 |
14.40 |
| 2026-06-14 12:00 |
07:25:32.02 |
-02:27:43.7 |
HIP 36071 |
14.29 |
| 2026-06-15 00:00 |
07:25:32.85 |
-02:27:42.8 |
HIP 36071 |
14.19 |
| 2026-06-15 12:00 |
07:25:33.68 |
-02:27:41.9 |
HIP 36071 |
14.08 |
| 2026-06-16 00:00 |
07:25:34.52 |
-02:27:41.0 |
HIP 36071 |
13.98 |
| 2026-06-16 12:00 |
07:25:35.36 |
-02:27:40.3 |
HIP 36071 |
13.89 |
| 2026-06-17 00:00 |
07:25:36.20 |
-02:27:39.5 |
HIP 36071 |
13.80 |
| 2026-06-17 12:00 |
07:25:37.05 |
-02:27:38.8 |
HIP 36071 |
13.71 |
| 2026-06-18 00:00 |
07:25:37.90 |
-02:27:38.2 |
HIP 36071 |
13.62 |
| 2026-06-18 12:00 |
07:25:38.75 |
-02:27:37.6 |
HIP 36071 |
13.54 |
| 2026-06-19 00:00 |
07:25:39.61 |
-02:27:37.1 |
HIP 36071 |
13.46 |
| 2026-06-19 12:00 |
07:25:40.47 |
-02:27:36.6 |
HIP 36071 |
13.38 |
| 2026-06-20 00:00 |
07:25:41.33 |
-02:27:36.2 |
HIP 36071 |
13.31 |
| 2026-06-20 12:00 |
07:25:42.19 |
-02:27:35.8 |
HIP 36071 |
13.24 |
| 2026-06-21 00:00 |
07:25:43.06 |
-02:27:35.5 |
HIP 36071 |
13.17 |
| 2026-06-21 12:00 |
07:25:43.93 |
-02:27:35.2 |
HIP 36071 |
13.11 |
| 2026-06-22 00:00 |
07:25:44.80 |
-02:27:35.0 |
HIP 36071 |
13.06 |