| 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) |
| 2026-03-26 00:00 |
07:24:34.22 |
-02:39:05.0 |
HIP 35843 |
16.92 |
| 2026-03-26 12:00 |
07:24:33.99 |
-02:38:58.8 |
HIP 35843 |
16.84 |
| 2026-03-27 00:00 |
07:24:33.77 |
-02:38:52.6 |
HIP 35843 |
16.77 |
| 2026-03-27 12:00 |
07:24:33.55 |
-02:38:46.4 |
HIP 35843 |
16.69 |
| 2026-03-28 00:00 |
07:24:33.34 |
-02:38:40.2 |
HIP 35843 |
16.62 |
| 2026-03-28 12:00 |
07:24:33.14 |
-02:38:34.0 |
HIP 35843 |
16.55 |
| 2026-03-29 00:00 |
07:24:32.95 |
-02:38:27.8 |
HIP 35843 |
16.48 |
| 2026-03-29 12:00 |
07:24:32.76 |
-02:38:21.6 |
HIP 35843 |
16.42 |
| 2026-03-30 00:00 |
07:24:32.59 |
-02:38:15.5 |
HIP 35843 |
16.35 |
| 2026-03-30 12:00 |
07:24:32.42 |
-02:38:09.3 |
HIP 35843 |
16.29 |
| 2026-03-31 00:00 |
07:24:32.26 |
-02:38:03.1 |
HIP 35843 |
16.24 |
| 2026-03-31 12:00 |
07:24:32.11 |
-02:37:57.0 |
HIP 35843 |
16.18 |
| 2026-04-01 00:00 |
07:24:31.96 |
-02:37:50.8 |
HIP 35843 |
16.13 |
| 2026-04-01 12:00 |
07:24:31.83 |
-02:37:44.7 |
HIP 35843 |
16.08 |
| 2026-04-02 00:00 |
07:24:31.70 |
-02:37:38.6 |
HIP 35843 |
16.03 |
| 2026-04-02 12:00 |
07:24:31.58 |
-02:37:32.5 |
HIP 35843 |
15.99 |
| 2026-04-03 00:00 |
07:24:31.46 |
-02:37:26.4 |
HIP 35843 |
15.95 |
| 2026-04-03 12:00 |
07:24:31.36 |
-02:37:20.3 |
HIP 35843 |
15.91 |
| 2026-04-04 00:00 |
07:24:31.26 |
-02:37:14.2 |
HIP 35843 |
15.87 |
| 2026-04-04 12:00 |
07:24:31.17 |
-02:37:08.1 |
HIP 35843 |
15.84 |
| 2026-04-05 00:00 |
07:24:31.09 |
-02:37:02.1 |
HIP 35843 |
15.80 |
| 2026-04-05 12:00 |
07:24:31.02 |
-02:36:56.0 |
HIP 35843 |
15.77 |
| 2026-04-06 00:00 |
07:24:30.96 |
-02:36:50.0 |
HIP 35843 |
15.75 |
| 2026-04-06 12:00 |
07:24:30.90 |
-02:36:44.0 |
HIP 35843 |
15.72 |
| 2026-04-07 00:00 |
07:24:30.85 |
-02:36:37.9 |
HIP 35843 |
15.70 |
| 2026-04-07 12:00 |
07:24:30.81 |
-02:36:31.9 |
HIP 35843 |
15.69 |
| 2026-04-08 00:00 |
07:24:30.78 |
-02:36:26.0 |
HIP 35843 |
15.67 |
| 2026-04-08 12:00 |
07:24:30.75 |
-02:36:20.0 |
HIP 35843 |
15.66 |
| 2026-04-09 00:00 |
07:24:30.74 |
-02:36:14.1 |
HIP 35843 |
15.65 |
| 2026-04-09 12:00 |
07:24:30.73 |
-02:36:08.1 |
HIP 35843 |
15.64 |
| 2026-04-10 00:00 |
07:24:30.73 |
-02:36:02.2 |
HIP 35843 |
15.63 |
| 2026-04-10 12:00 |
07:24:30.73 |
-02:35:56.3 |
HIP 35843 |
15.63 |
| 2026-04-11 00:00 |
07:24:30.75 |
-02:35:50.4 |
HIP 35843 |
15.63 |
| 2026-04-11 12:00 |
07:24:30.77 |
-02:35:44.5 |
HIP 35843 |
15.63 |
| 2026-04-12 00:00 |
07:24:30.80 |
-02:35:38.7 |
HIP 35843 |
15.64 |
| 2026-04-12 12:00 |
07:24:30.84 |
-02:35:32.9 |
HIP 35843 |
15.64 |
| 2026-04-13 00:00 |
07:24:30.89 |
-02:35:27.1 |
HIP 35843 |
15.66 |
| 2026-04-13 12:00 |
07:24:30.95 |
-02:35:21.3 |
HIP 35843 |
15.67 |
| 2026-04-14 00:00 |
07:24:31.01 |
-02:35:15.5 |
HIP 35843 |
15.68 |
| 2026-04-14 12:00 |
07:24:31.08 |
-02:35:09.7 |
HIP 35843 |
15.70 |
| 2026-04-15 00:00 |
07:24:31.16 |
-02:35:04.0 |
HIP 35843 |
15.72 |
| 2026-04-15 12:00 |
07:24:31.25 |
-02:34:58.3 |
HIP 35843 |
15.75 |
| 2026-04-16 00:00 |
07:24:31.34 |
-02:34:52.6 |
HIP 35843 |
15.77 |