| Parameter |
Value |
| Designation |
C/1892 E1 (Swift) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1892-04-07T03:44:20.731200Z |
| Orbit solution date (soln_date, UTC) |
2023-10-09T20:36:13Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1892-07-27.0000000 |
| e |
0.99880065 |
| q (au) |
1.026893 |
| a (au) |
856.207621 |
| i (deg) |
38.700724 |
| Ω (om, deg) |
242.428343 |
| ω (w, deg) |
24.504179 |
| M (ma, deg) |
0.004361 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
04:56:38.96 |
+12:53:52.6 |
HIP 23085 |
22.86 |
| 2026-05-12 12:00 |
04:56:39.72 |
+12:53:54.6 |
HIP 23085 |
22.67 |
| 2026-05-13 00:00 |
04:56:40.49 |
+12:53:56.6 |
HIP 23085 |
22.49 |
| 2026-05-13 12:00 |
04:56:41.26 |
+12:53:58.5 |
HIP 23085 |
22.30 |
| 2026-05-14 00:00 |
04:56:42.03 |
+12:54:00.5 |
HIP 23085 |
22.12 |
| 2026-05-14 12:00 |
04:56:42.80 |
+12:54:02.4 |
HIP 23085 |
21.93 |
| 2026-05-15 00:00 |
04:56:43.58 |
+12:54:04.4 |
HIP 23085 |
21.74 |
| 2026-05-15 12:00 |
04:56:44.36 |
+12:54:06.3 |
HIP 23085 |
21.55 |
| 2026-05-16 00:00 |
04:56:45.14 |
+12:54:08.2 |
HIP 23085 |
21.36 |
| 2026-05-16 12:00 |
04:56:45.92 |
+12:54:10.1 |
HIP 23085 |
21.17 |
| 2026-05-17 00:00 |
04:56:46.71 |
+12:54:12.0 |
HIP 23085 |
20.99 |
| 2026-05-17 12:00 |
04:56:47.50 |
+12:54:13.9 |
HIP 23085 |
20.80 |
| 2026-05-18 00:00 |
04:56:48.29 |
+12:54:15.7 |
HIP 23085 |
20.61 |
| 2026-05-18 12:00 |
04:56:49.08 |
+12:54:17.6 |
HIP 23085 |
20.41 |
| 2026-05-19 00:00 |
04:56:49.88 |
+12:54:19.4 |
HIP 23085 |
20.22 |
| 2026-05-19 12:00 |
04:56:50.67 |
+12:54:21.2 |
HIP 23085 |
20.03 |
| 2026-05-20 00:00 |
04:56:51.47 |
+12:54:23.0 |
HIP 23085 |
19.84 |
| 2026-05-20 12:00 |
04:56:52.27 |
+12:54:24.8 |
HIP 23085 |
19.65 |
| 2026-05-21 00:00 |
04:56:53.08 |
+12:54:26.6 |
HIP 23085 |
19.46 |
| 2026-05-21 12:00 |
04:56:53.88 |
+12:54:28.4 |
HIP 23085 |
19.27 |
| 2026-05-22 00:00 |
04:56:54.69 |
+12:54:30.1 |
HIP 23085 |
19.07 |
| 2026-05-22 12:00 |
04:56:55.50 |
+12:54:31.8 |
HIP 23085 |
18.88 |
| 2026-05-23 00:00 |
04:56:56.31 |
+12:54:33.6 |
HIP 23085 |
18.69 |
| 2026-05-23 12:00 |
04:56:57.12 |
+12:54:35.3 |
HIP 23085 |
18.50 |
| 2026-05-24 00:00 |
04:56:57.94 |
+12:54:37.0 |
HIP 23085 |
18.31 |
| 2026-05-24 12:00 |
04:56:58.75 |
+12:54:38.6 |
HIP 23085 |
18.11 |
| 2026-05-25 00:00 |
04:56:59.57 |
+12:54:40.3 |
HIP 23085 |
17.92 |
| 2026-05-25 12:00 |
04:57:00.39 |
+12:54:41.9 |
HIP 23085 |
17.73 |
| 2026-05-26 00:00 |
04:57:01.21 |
+12:54:43.6 |
HIP 23085 |
17.53 |
| 2026-05-26 12:00 |
04:57:02.03 |
+12:54:45.2 |
HIP 23085 |
17.34 |
| 2026-05-27 00:00 |
04:57:02.85 |
+12:54:46.8 |
HIP 23085 |
17.15 |
| 2026-05-27 12:00 |
04:57:03.67 |
+12:54:48.4 |
HIP 23085 |
16.96 |
| 2026-05-28 00:00 |
04:57:04.50 |
+12:54:49.9 |
HIP 23085 |
16.76 |
| 2026-05-28 12:00 |
04:57:05.32 |
+12:54:51.5 |
HIP 23085 |
16.57 |
| 2026-05-29 00:00 |
04:57:06.15 |
+12:54:53.0 |
HIP 23085 |
16.38 |
| 2026-05-29 12:00 |
04:57:06.98 |
+12:54:54.5 |
HIP 23085 |
16.19 |
| 2026-05-30 00:00 |
04:57:07.80 |
+12:54:56.0 |
HIP 23085 |
16.00 |
| 2026-05-30 12:00 |
04:57:08.63 |
+12:54:57.5 |
HIP 23085 |
15.80 |
| 2026-05-31 00:00 |
04:57:09.46 |
+12:54:59.0 |
HIP 23085 |
15.61 |
| 2026-05-31 12:00 |
04:57:10.29 |
+12:55:00.5 |
HIP 23085 |
15.42 |
| 2026-06-01 00:00 |
04:57:11.13 |
+12:55:01.9 |
HIP 23085 |
15.23 |
| 2026-06-01 12:00 |
04:57:11.96 |
+12:55:03.3 |
HIP 23085 |
15.04 |
| 2026-06-02 00:00 |
04:57:12.79 |
+12:55:04.7 |
HIP 23085 |
14.85 |