메타데이터
| 항목 |
값 |
| Designation |
C/1988 P1 (Machholz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1988-09-17T13:37:56.176320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:36Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1988-08-19.0000000 |
| e |
0.99999939 |
| q (au) |
0.164552 |
| a (au) |
268133.697775 |
| i (deg) |
40.198656 |
| Ω (om, deg) |
167.727558 |
| ω (w, deg) |
349.037996 |
| M (ma, deg) |
360.000000 |
밝기
산란 + 전체 선형
$$
M_a = (7.848 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.848 |
| n |
2.000 |
| gf |
0.982 |
| gb |
-1.000 |
| k |
0.950 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
22:09:14.05 |
+00:14:41.7 |
HIP 109302 |
10.08 |
| 2026-09-20 12:00 |
22:09:12.50 |
+00:14:30.4 |
HIP 109302 |
9.87 |
| 2026-09-21 00:00 |
22:09:10.96 |
+00:14:19.0 |
HIP 109302 |
9.68 |
| 2026-09-21 12:00 |
22:09:09.43 |
+00:14:07.6 |
HIP 109302 |
9.50 |
| 2026-09-22 00:00 |
22:09:07.91 |
+00:13:56.2 |
HIP 109302 |
9.34 |
| 2026-09-22 12:00 |
22:09:06.40 |
+00:13:44.9 |
HIP 109302 |
9.20 |
| 2026-09-23 00:00 |
22:09:04.89 |
+00:13:33.5 |
HIP 109302 |
9.08 |
| 2026-09-23 12:00 |
22:09:03.39 |
+00:13:22.1 |
HIP 109302 |
8.98 |
| 2026-09-24 00:00 |
22:09:01.90 |
+00:13:10.7 |
HIP 109302 |
8.90 |
| 2026-09-24 12:00 |
22:09:00.41 |
+00:12:59.4 |
HIP 109302 |
8.83 |
| 2026-09-25 00:00 |
22:08:58.93 |
+00:12:48.0 |
HIP 109302 |
8.79 |
| 2026-09-25 12:00 |
22:08:57.47 |
+00:12:36.6 |
HIP 109302 |
8.77 |
| 2026-09-26 00:00 |
22:08:56.01 |
+00:12:25.3 |
HIP 109302 |
8.77 |
| 2026-09-26 12:00 |
22:08:54.55 |
+00:12:13.9 |
HIP 109302 |
8.79 |
| 2026-09-27 00:00 |
22:08:53.11 |
+00:12:02.6 |
HIP 109302 |
8.83 |
| 2026-09-27 12:00 |
22:08:51.68 |
+00:11:51.2 |
HIP 109301 |
8.65 |
| 2026-09-28 00:00 |
22:08:50.25 |
+00:11:39.9 |
HIP 109301 |
8.36 |
| 2026-09-28 12:00 |
22:08:48.83 |
+00:11:28.6 |
HIP 109301 |
8.08 |
| 2026-09-29 00:00 |
22:08:47.43 |
+00:11:17.3 |
HIP 109301 |
7.81 |
| 2026-09-29 12:00 |
22:08:46.03 |
+00:11:06.0 |
HIP 109301 |
7.56 |
| 2026-09-30 00:00 |
22:08:44.64 |
+00:10:54.7 |
HIP 109301 |
7.32 |
| 2026-09-30 12:00 |
22:08:43.25 |
+00:10:43.4 |
HIP 109301 |
7.09 |
| 2026-10-01 00:00 |
22:08:41.88 |
+00:10:32.1 |
HIP 109301 |
6.87 |
| 2026-10-01 12:00 |
22:08:40.52 |
+00:10:20.9 |
HIP 109301 |
6.68 |
| 2026-10-02 00:00 |
22:08:39.17 |
+00:10:09.6 |
HIP 109301 |
6.50 |
| 2026-10-02 12:00 |
22:08:37.82 |
+00:09:58.4 |
HIP 109301 |
6.34 |
| 2026-10-03 00:00 |
22:08:36.49 |
+00:09:47.2 |
HIP 109301 |
6.20 |
| 2026-10-03 12:00 |
22:08:35.17 |
+00:09:36.0 |
HIP 109301 |
6.07 |
| 2026-10-04 00:00 |
22:08:33.85 |
+00:09:24.8 |
HIP 109301 |
5.97 |
| 2026-10-04 12:00 |
22:08:32.55 |
+00:09:13.7 |
HIP 109301 |
5.90 |
| 2026-10-05 00:00 |
22:08:31.26 |
+00:09:02.5 |
HIP 109301 |
5.84 |
| 2026-10-05 12:00 |
22:08:29.97 |
+00:08:51.4 |
HIP 109301 |
5.81 |
| 2026-10-06 00:00 |
22:08:28.70 |
+00:08:40.3 |
HIP 109301 |
5.80 |
| 2026-10-06 12:00 |
22:08:27.44 |
+00:08:29.3 |
HIP 109301 |
5.81 |
| 2026-10-07 00:00 |
22:08:26.19 |
+00:08:18.2 |
HIP 109301 |
5.85 |
| 2026-10-07 12:00 |
22:08:24.94 |
+00:08:07.2 |
HIP 109301 |
5.90 |
| 2026-10-08 00:00 |
22:08:23.71 |
+00:07:56.2 |
HIP 109301 |
5.97 |
| 2026-10-08 12:00 |
22:08:22.50 |
+00:07:45.2 |
HIP 109301 |
6.07 |
| 2026-10-09 00:00 |
22:08:21.29 |
+00:07:34.3 |
HIP 109301 |
6.18 |
| 2026-10-09 12:00 |
22:08:20.09 |
+00:07:23.4 |
HIP 109301 |
6.30 |
| 2026-10-10 00:00 |
22:08:18.90 |
+00:07:12.5 |
HIP 109301 |
6.44 |
| 2026-10-10 12:00 |
22:08:17.73 |
+00:07:01.6 |
HIP 109301 |
6.60 |
| 2026-10-11 00:00 |
22:08:16.57 |
+00:06:50.8 |
HIP 109301 |
6.76 |