| Parameter |
Value |
| Designation |
C/1879 Q1 (Palisa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1879-10-05T03:30:11.998080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:51Z |
| Obs used |
12 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1879-09-25.0000000 |
| e |
1.00000000 |
| q (au) |
0.989534 |
| a (au) |
- |
| i (deg) |
77.124284 |
| Ω (om, deg) |
88.875147 |
| ω (w, deg) |
115.480262 |
| M (ma, deg) |
- |
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) |
| 2026-09-20 00:00 |
04:44:40.12 |
-48:27:44.6 |
HIP 22006 |
11.65 |
| 2026-09-20 12:00 |
04:44:39.82 |
-48:27:55.1 |
HIP 22006 |
11.74 |
| 2026-09-21 00:00 |
04:44:39.51 |
-48:28:05.5 |
HIP 22006 |
11.82 |
| 2026-09-21 12:00 |
04:44:39.20 |
-48:28:15.9 |
HIP 22006 |
11.91 |
| 2026-09-22 00:00 |
04:44:38.87 |
-48:28:26.3 |
HIP 22006 |
12.00 |
| 2026-09-22 12:00 |
04:44:38.53 |
-48:28:36.7 |
HIP 22006 |
12.09 |
| 2026-09-23 00:00 |
04:44:38.19 |
-48:28:47.0 |
HIP 22006 |
12.18 |
| 2026-09-23 12:00 |
04:44:37.83 |
-48:28:57.4 |
HIP 22006 |
12.27 |
| 2026-09-24 00:00 |
04:44:37.47 |
-48:29:07.7 |
HIP 22006 |
12.36 |
| 2026-09-24 12:00 |
04:44:37.10 |
-48:29:18.0 |
HIP 22006 |
12.46 |
| 2026-09-25 00:00 |
04:44:36.72 |
-48:29:28.2 |
HIP 22006 |
12.55 |
| 2026-09-25 12:00 |
04:44:36.32 |
-48:29:38.4 |
HIP 22006 |
12.64 |
| 2026-09-26 00:00 |
04:44:35.92 |
-48:29:48.6 |
HIP 22006 |
12.74 |
| 2026-09-26 12:00 |
04:44:35.51 |
-48:29:58.8 |
HIP 22006 |
12.83 |
| 2026-09-27 00:00 |
04:44:35.09 |
-48:30:09.0 |
HIP 22006 |
12.93 |
| 2026-09-27 12:00 |
04:44:34.66 |
-48:30:19.1 |
HIP 22006 |
13.02 |
| 2026-09-28 00:00 |
04:44:34.23 |
-48:30:29.2 |
HIP 22006 |
13.12 |
| 2026-09-28 12:00 |
04:44:33.78 |
-48:30:39.2 |
HIP 22006 |
13.22 |
| 2026-09-29 00:00 |
04:44:33.32 |
-48:30:49.2 |
HIP 22006 |
13.31 |
| 2026-09-29 12:00 |
04:44:32.86 |
-48:30:59.2 |
HIP 22006 |
13.41 |
| 2026-09-30 00:00 |
04:44:32.39 |
-48:31:09.2 |
HIP 22006 |
13.51 |
| 2026-09-30 12:00 |
04:44:31.90 |
-48:31:19.1 |
HIP 22006 |
13.61 |
| 2026-10-01 00:00 |
04:44:31.41 |
-48:31:29.0 |
HIP 22006 |
13.71 |
| 2026-10-01 12:00 |
04:44:30.91 |
-48:31:38.9 |
HIP 22006 |
13.81 |
| 2026-10-02 00:00 |
04:44:30.40 |
-48:31:48.7 |
HIP 22006 |
13.91 |
| 2026-10-02 12:00 |
04:44:29.88 |
-48:31:58.5 |
HIP 22006 |
14.01 |
| 2026-10-03 00:00 |
04:44:29.35 |
-48:32:08.2 |
HIP 22006 |
14.12 |
| 2026-10-03 12:00 |
04:44:28.82 |
-48:32:17.9 |
HIP 22006 |
14.22 |
| 2026-10-04 00:00 |
04:44:28.27 |
-48:32:27.6 |
HIP 22006 |
14.32 |
| 2026-10-04 12:00 |
04:44:27.72 |
-48:32:37.3 |
HIP 22006 |
14.42 |
| 2026-10-05 00:00 |
04:44:27.15 |
-48:32:46.8 |
HIP 22006 |
14.53 |
| 2026-10-05 12:00 |
04:44:26.58 |
-48:32:56.4 |
HIP 22006 |
14.63 |
| 2026-10-06 00:00 |
04:44:26.00 |
-48:33:05.9 |
HIP 22006 |
14.73 |
| 2026-10-06 12:00 |
04:44:25.41 |
-48:33:15.4 |
HIP 22006 |
14.84 |
| 2026-10-07 00:00 |
04:44:24.81 |
-48:33:24.8 |
HIP 22006 |
14.94 |
| 2026-10-07 12:00 |
04:44:24.21 |
-48:33:34.2 |
HIP 22006 |
15.05 |
| 2026-10-08 00:00 |
04:44:23.59 |
-48:33:43.5 |
HIP 22006 |
15.16 |
| 2026-10-08 12:00 |
04:44:22.97 |
-48:33:52.8 |
HIP 22006 |
15.26 |
| 2026-10-09 00:00 |
04:44:22.33 |
-48:34:02.0 |
HIP 22006 |
15.37 |
| 2026-10-09 12:00 |
04:44:21.69 |
-48:34:11.2 |
HIP 22006 |
15.47 |
| 2026-10-10 00:00 |
04:44:21.05 |
-48:34:20.4 |
HIP 22006 |
15.58 |
| 2026-10-10 12:00 |
04:44:20.39 |
-48:34:29.5 |
HIP 22006 |
15.69 |
| 2026-10-11 00:00 |
04:44:19.72 |
-48:34:38.5 |
HIP 22006 |
15.80 |