C/1879 Q1 (Palisa)
| 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) |
| 2026-02-03 00:00 |
04:40:32.88 |
-48:34:50.3 |
HIP 21771 |
2.55 |
| 2026-02-03 12:00 |
04:40:32.34 |
-48:34:40.7 |
HIP 21771 |
2.40 |
| 2026-02-04 00:00 |
04:40:31.80 |
-48:34:31.0 |
HIP 21771 |
2.26 |
| 2026-02-04 12:00 |
04:40:31.27 |
-48:34:21.4 |
HIP 21771 |
2.11 |
| 2026-02-05 00:00 |
04:40:30.76 |
-48:34:11.6 |
HIP 21771 |
1.98 |
| 2026-02-05 12:00 |
04:40:30.25 |
-48:34:01.8 |
HIP 21771 |
1.85 |
| 2026-02-06 00:00 |
04:40:29.75 |
-48:33:52.0 |
HIP 21771 |
1.73 |
| 2026-02-06 12:00 |
04:40:29.26 |
-48:33:42.2 |
HIP 21771 |
1.63 |
| 2026-02-07 00:00 |
04:40:28.78 |
-48:33:32.3 |
HIP 21771 |
1.53 |
| 2026-02-07 12:00 |
04:40:28.30 |
-48:33:22.3 |
HIP 21771 |
1.45 |
| 2026-02-08 00:00 |
04:40:27.84 |
-48:33:12.3 |
HIP 21771 |
1.39 |
| 2026-02-08 12:00 |
04:40:27.39 |
-48:33:02.3 |
HIP 21771 |
1.35 |
| 2026-02-09 00:00 |
04:40:26.95 |
-48:32:52.2 |
HIP 21771 |
1.33 |
| 2026-02-09 12:00 |
04:40:26.51 |
-48:32:42.1 |
HIP 21771 |
1.34 |
| 2026-02-10 00:00 |
04:40:26.09 |
-48:32:31.9 |
HIP 21771 |
1.37 |
| 2026-02-10 12:00 |
04:40:25.67 |
-48:32:21.7 |
HIP 21771 |
1.42 |
| 2026-02-11 00:00 |
04:40:25.27 |
-48:32:11.5 |
HIP 21771 |
1.49 |
| 2026-02-11 12:00 |
04:40:24.87 |
-48:32:01.2 |
HIP 21771 |
1.57 |
| 2026-02-12 00:00 |
04:40:24.49 |
-48:31:50.9 |
HIP 21771 |
1.67 |
| 2026-02-12 12:00 |
04:40:24.11 |
-48:31:40.6 |
HIP 21771 |
1.78 |
| 2026-02-13 00:00 |
04:40:23.74 |
-48:31:30.2 |
HIP 21771 |
1.91 |
| 2026-02-13 12:00 |
04:40:23.39 |
-48:31:19.8 |
HIP 21771 |
2.04 |
| 2026-02-14 00:00 |
04:40:23.04 |
-48:31:09.4 |
HIP 21771 |
2.17 |
| 2026-02-14 12:00 |
04:40:22.70 |
-48:30:58.9 |
HIP 21771 |
2.32 |
| 2026-02-15 00:00 |
04:40:22.38 |
-48:30:48.4 |
HIP 21771 |
2.46 |
| 2026-02-15 12:00 |
04:40:22.06 |
-48:30:37.9 |
HIP 21771 |
2.61 |
| 2026-02-16 00:00 |
04:40:21.75 |
-48:30:27.3 |
HIP 21771 |
2.77 |
| 2026-02-16 12:00 |
04:40:21.45 |
-48:30:16.7 |
HIP 21771 |
2.92 |
| 2026-02-17 00:00 |
04:40:21.16 |
-48:30:06.1 |
HIP 21771 |
3.08 |
| 2026-02-17 12:00 |
04:40:20.89 |
-48:29:55.5 |
HIP 21771 |
3.24 |
| 2026-02-18 00:00 |
04:40:20.62 |
-48:29:44.8 |
HIP 21771 |
3.40 |
| 2026-02-18 12:00 |
04:40:20.36 |
-48:29:34.1 |
HIP 21771 |
3.57 |
| 2026-02-19 00:00 |
04:40:20.11 |
-48:29:23.4 |
HIP 21771 |
3.73 |
| 2026-02-19 12:00 |
04:40:19.87 |
-48:29:12.7 |
HIP 21771 |
3.90 |
| 2026-02-20 00:00 |
04:40:19.64 |
-48:29:01.9 |
HIP 21771 |
4.06 |
| 2026-02-20 12:00 |
04:40:19.43 |
-48:28:51.1 |
HIP 21771 |
4.23 |
| 2026-02-21 00:00 |
04:40:19.22 |
-48:28:40.3 |
HIP 21771 |
4.40 |
| 2026-02-21 12:00 |
04:40:19.02 |
-48:28:29.5 |
HIP 21771 |
4.56 |
| 2026-02-22 00:00 |
04:40:18.83 |
-48:28:18.6 |
HIP 21771 |
4.73 |
| 2026-02-22 12:00 |
04:40:18.65 |
-48:28:07.8 |
HIP 21771 |
4.90 |
| 2026-02-23 00:00 |
04:40:18.49 |
-48:27:56.9 |
HIP 21771 |
5.07 |
| 2026-02-23 12:00 |
04:40:18.33 |
-48:27:46.0 |
HIP 21771 |
5.24 |
| 2026-02-24 00:00 |
04:40:18.18 |
-48:27:35.1 |
HIP 21771 |
5.41 |