| Parameter |
Value |
| Designation |
C/1948 V1 (Eclipse comet) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1948-10-27T10:14:33.031680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
17 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1949-01-10.0000000 |
| e |
0.99991400 |
| q (au) |
0.135439 |
| a (au) |
1574.787178 |
| i (deg) |
23.116272 |
| Ω (om, deg) |
211.042719 |
| ω (w, deg) |
107.249362 |
| M (ma, deg) |
0.001176 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.919 + 4.296\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.919 |
| n |
4.296 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-09-20 00:00 |
08:46:50.58 |
-05:14:02.5 |
HIP 43284 |
33.02 |
| 2026-09-20 12:00 |
08:46:51.32 |
-05:14:10.4 |
HIP 43284 |
32.83 |
| 2026-09-21 00:00 |
08:46:52.06 |
-05:14:18.3 |
HIP 43284 |
32.65 |
| 2026-09-21 12:00 |
08:46:52.79 |
-05:14:26.2 |
HIP 43284 |
32.47 |
| 2026-09-22 00:00 |
08:46:53.51 |
-05:14:34.1 |
HIP 43284 |
32.29 |
| 2026-09-22 12:00 |
08:46:54.22 |
-05:14:42.0 |
HIP 43284 |
32.11 |
| 2026-09-23 00:00 |
08:46:54.92 |
-05:14:50.0 |
HIP 43284 |
31.94 |
| 2026-09-23 12:00 |
08:46:55.62 |
-05:14:57.9 |
HIP 43284 |
31.77 |
| 2026-09-24 00:00 |
08:46:56.31 |
-05:15:05.9 |
HIP 43284 |
31.60 |
| 2026-09-24 12:00 |
08:46:57.00 |
-05:15:13.9 |
HIP 43284 |
31.43 |
| 2026-09-25 00:00 |
08:46:57.67 |
-05:15:21.8 |
HIP 43284 |
31.27 |
| 2026-09-25 12:00 |
08:46:58.34 |
-05:15:29.8 |
HIP 43284 |
31.11 |
| 2026-09-26 00:00 |
08:46:59.00 |
-05:15:37.8 |
HIP 43284 |
30.95 |
| 2026-09-26 12:00 |
08:46:59.66 |
-05:15:45.8 |
HIP 43284 |
30.79 |
| 2026-09-27 00:00 |
08:47:00.30 |
-05:15:53.8 |
HIP 43284 |
30.64 |
| 2026-09-27 12:00 |
08:47:00.94 |
-05:16:01.8 |
HIP 43284 |
30.48 |
| 2026-09-28 00:00 |
08:47:01.57 |
-05:16:09.8 |
HIP 43284 |
30.33 |
| 2026-09-28 12:00 |
08:47:02.20 |
-05:16:17.8 |
HIP 43284 |
30.19 |
| 2026-09-29 00:00 |
08:47:02.81 |
-05:16:25.9 |
HIP 43284 |
30.04 |
| 2026-09-29 12:00 |
08:47:03.42 |
-05:16:33.9 |
HIP 43284 |
29.90 |
| 2026-09-30 00:00 |
08:47:04.02 |
-05:16:41.9 |
HIP 43284 |
29.76 |
| 2026-09-30 12:00 |
08:47:04.61 |
-05:16:49.9 |
HIP 43284 |
29.63 |
| 2026-10-01 00:00 |
08:47:05.19 |
-05:16:58.0 |
HIP 43284 |
29.49 |
| 2026-10-01 12:00 |
08:47:05.77 |
-05:17:06.0 |
HIP 43284 |
29.36 |
| 2026-10-02 00:00 |
08:47:06.33 |
-05:17:14.0 |
HIP 43284 |
29.24 |
| 2026-10-02 12:00 |
08:47:06.89 |
-05:17:22.1 |
HIP 43284 |
29.11 |
| 2026-10-03 00:00 |
08:47:07.45 |
-05:17:30.1 |
HIP 43284 |
28.99 |
| 2026-10-03 12:00 |
08:47:07.99 |
-05:17:38.1 |
HIP 43284 |
28.87 |
| 2026-10-04 00:00 |
08:47:08.52 |
-05:17:46.2 |
HIP 43284 |
28.75 |
| 2026-10-04 12:00 |
08:47:09.05 |
-05:17:54.2 |
HIP 43284 |
28.64 |
| 2026-10-05 00:00 |
08:47:09.57 |
-05:18:02.2 |
HIP 43284 |
28.53 |
| 2026-10-05 12:00 |
08:47:10.08 |
-05:18:10.3 |
HIP 43284 |
28.42 |
| 2026-10-06 00:00 |
08:47:10.58 |
-05:18:18.3 |
HIP 43284 |
28.31 |
| 2026-10-06 12:00 |
08:47:11.07 |
-05:18:26.3 |
HIP 43284 |
28.21 |
| 2026-10-07 00:00 |
08:47:11.55 |
-05:18:34.3 |
HIP 43284 |
28.11 |
| 2026-10-07 12:00 |
08:47:12.03 |
-05:18:42.3 |
HIP 43284 |
28.01 |
| 2026-10-08 00:00 |
08:47:12.49 |
-05:18:50.3 |
HIP 43284 |
27.92 |
| 2026-10-08 12:00 |
08:47:12.95 |
-05:18:58.3 |
HIP 43284 |
27.83 |
| 2026-10-09 00:00 |
08:47:13.40 |
-05:19:06.3 |
HIP 43284 |
27.74 |
| 2026-10-09 12:00 |
08:47:13.84 |
-05:19:14.3 |
HIP 43284 |
27.66 |
| 2026-10-10 00:00 |
08:47:14.27 |
-05:19:22.2 |
HIP 43284 |
27.57 |
| 2026-10-10 12:00 |
08:47:14.69 |
-05:19:30.2 |
HIP 43284 |
27.49 |
| 2026-10-11 00:00 |
08:47:15.11 |
-05:19:38.1 |
HIP 43284 |
27.42 |