C/1957 U1 (Latyshev-Wild-Burnham)
| Parameter |
Value |
| Designation |
C/1957 U1 (Latyshev-Wild-Burnham) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1957-12-05T03:06:11.520000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
9 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1957-12-05.1293000 |
| e |
1.00000000 |
| q (au) |
0.539130 |
| a (au) |
- |
| i (deg) |
156.715400 |
| Ω (om, deg) |
210.875300 |
| ω (w, deg) |
277.613800 |
| M (ma, deg) |
- |
Magnitude
Scatter + Global Linear
$$
M_a = (11.780 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.780 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.525 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
08:44:45.34 |
+42:27:44.2 |
HIP 42953 |
7.52 |
| 2026-02-03 12:00 |
08:44:43.63 |
+42:27:48.2 |
HIP 42953 |
7.83 |
| 2026-02-04 00:00 |
08:44:41.92 |
+42:27:52.1 |
HIP 42953 |
8.14 |
| 2026-02-04 12:00 |
08:44:40.21 |
+42:27:56.0 |
HIP 42953 |
8.45 |
| 2026-02-05 00:00 |
08:44:38.51 |
+42:27:59.8 |
HIP 42953 |
8.76 |
| 2026-02-05 12:00 |
08:44:36.81 |
+42:28:03.4 |
HIP 42953 |
9.07 |
| 2026-02-06 00:00 |
08:44:35.10 |
+42:28:07.1 |
HIP 42953 |
9.38 |
| 2026-02-06 12:00 |
08:44:33.40 |
+42:28:10.6 |
HIP 42953 |
9.69 |
| 2026-02-07 00:00 |
08:44:31.71 |
+42:28:14.1 |
HIP 42953 |
10.00 |
| 2026-02-07 12:00 |
08:44:30.01 |
+42:28:17.5 |
HIP 42953 |
10.31 |
| 2026-02-08 00:00 |
08:44:28.32 |
+42:28:20.8 |
HIP 42953 |
10.62 |
| 2026-02-08 12:00 |
08:44:26.63 |
+42:28:24.0 |
HIP 42953 |
10.93 |
| 2026-02-09 00:00 |
08:44:24.94 |
+42:28:27.2 |
HIP 42953 |
11.23 |
| 2026-02-09 12:00 |
08:44:23.26 |
+42:28:30.3 |
HIP 42953 |
11.54 |
| 2026-02-10 00:00 |
08:44:21.58 |
+42:28:33.3 |
HIP 42953 |
11.85 |
| 2026-02-10 12:00 |
08:44:19.90 |
+42:28:36.2 |
HIP 42953 |
12.16 |
| 2026-02-11 00:00 |
08:44:18.23 |
+42:28:39.0 |
HIP 42953 |
12.46 |
| 2026-02-11 12:00 |
08:44:16.56 |
+42:28:41.8 |
HIP 42953 |
12.77 |
| 2026-02-12 00:00 |
08:44:14.89 |
+42:28:44.5 |
HIP 42953 |
13.07 |
| 2026-02-12 12:00 |
08:44:13.22 |
+42:28:47.1 |
HIP 42953 |
13.37 |
| 2026-02-13 00:00 |
08:44:11.56 |
+42:28:49.6 |
HIP 42833 |
13.44 |
| 2026-02-13 12:00 |
08:44:09.91 |
+42:28:52.1 |
HIP 42833 |
13.27 |
| 2026-02-14 00:00 |
08:44:08.26 |
+42:28:54.4 |
HIP 42833 |
13.11 |
| 2026-02-14 12:00 |
08:44:06.61 |
+42:28:56.7 |
HIP 42833 |
12.95 |
| 2026-02-15 00:00 |
08:44:04.96 |
+42:28:58.9 |
HIP 42833 |
12.81 |
| 2026-02-15 12:00 |
08:44:03.33 |
+42:29:01.1 |
HIP 42833 |
12.67 |
| 2026-02-16 00:00 |
08:44:01.69 |
+42:29:03.1 |
HIP 42833 |
12.53 |
| 2026-02-16 12:00 |
08:44:00.06 |
+42:29:05.1 |
HIP 42833 |
12.41 |
| 2026-02-17 00:00 |
08:43:58.44 |
+42:29:07.0 |
HIP 42833 |
12.29 |
| 2026-02-17 12:00 |
08:43:56.82 |
+42:29:08.8 |
HIP 42833 |
12.18 |
| 2026-02-18 00:00 |
08:43:55.20 |
+42:29:10.5 |
HIP 42833 |
12.08 |
| 2026-02-18 12:00 |
08:43:53.59 |
+42:29:12.1 |
HIP 42833 |
11.99 |
| 2026-02-19 00:00 |
08:43:51.99 |
+42:29:13.7 |
HIP 42833 |
11.90 |
| 2026-02-19 12:00 |
08:43:50.39 |
+42:29:15.2 |
HIP 42833 |
11.82 |
| 2026-02-20 00:00 |
08:43:48.80 |
+42:29:16.6 |
HIP 42833 |
11.75 |
| 2026-02-20 12:00 |
08:43:47.21 |
+42:29:17.9 |
HIP 42833 |
11.69 |
| 2026-02-21 00:00 |
08:43:45.63 |
+42:29:19.1 |
HIP 42833 |
11.64 |
| 2026-02-21 12:00 |
08:43:44.06 |
+42:29:20.3 |
HIP 42833 |
11.60 |
| 2026-02-22 00:00 |
08:43:42.49 |
+42:29:21.3 |
HIP 42833 |
11.56 |
| 2026-02-22 12:00 |
08:43:40.93 |
+42:29:22.3 |
HIP 42833 |
11.54 |
| 2026-02-23 00:00 |
08:43:39.38 |
+42:29:23.2 |
HIP 42833 |
11.52 |
| 2026-02-23 12:00 |
08:43:37.83 |
+42:29:24.1 |
HIP 42833 |
11.51 |
| 2026-02-24 00:00 |
08:43:36.28 |
+42:29:24.8 |
HIP 42833 |
11.51 |