메타데이터
| 항목 |
값 |
| Designation |
123P/West-Hartley |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-02-04T20:21:33.413760Z |
| Orbit solution date (soln_date, UTC) |
2026-05-29T11:30:46Z |
| Obs used |
3575 |
| NEO |
- |
| M1 |
8.200 |
| K1 |
18.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-01-14.0000000 |
| e |
0.44911867 |
| q (au) |
2.126474 |
| a (au) |
3.860131 |
| i (deg) |
15.358541 |
| Ω (om, deg) |
46.504124 |
| ω (w, deg) |
102.974183 |
| M (ma, deg) |
262.291732 |
밝기
산란 + 전체 선형
$$
M_a = (9.015 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.015 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.747 |
| k |
0.999 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:33:31.85 |
+33:14:28.2 |
HIP 31290 |
13.22 |
| 2026-06-01 12:00 |
06:34:42.24 |
+33:13:50.5 |
HIP 31467 |
16.59 |
| 2026-06-02 00:00 |
06:35:52.72 |
+33:13:10.9 |
HIP 31585 |
13.68 |
| 2026-06-02 12:00 |
06:37:03.29 |
+33:12:29.4 |
HIP 31585 |
12.33 |
| 2026-06-03 00:00 |
06:38:13.95 |
+33:11:46.0 |
HIP 31796 |
13.41 |
| 2026-06-03 12:00 |
06:39:24.69 |
+33:11:00.6 |
HIP 31796 |
11.98 |
| 2026-06-04 00:00 |
06:40:35.52 |
+33:10:13.3 |
HIP 31960 |
9.01 |
| 2026-06-04 12:00 |
06:41:46.43 |
+33:09:24.0 |
HIP 31960 |
14.74 |
| 2026-06-05 00:00 |
06:42:57.42 |
+33:08:32.8 |
HIP 31960 |
28.22 |
| 2026-06-05 12:00 |
06:44:08.49 |
+33:07:39.7 |
HIP 32415 |
24.64 |
| 2026-06-06 00:00 |
06:45:19.64 |
+33:06:44.6 |
HIP 32415 |
10.30 |
| 2026-06-06 12:00 |
06:46:30.87 |
+33:05:47.5 |
HIP 32415 |
7.13 |
| 2026-06-07 00:00 |
06:47:42.18 |
+33:04:48.5 |
HIP 32546 |
3.43 |
| 2026-06-07 12:00 |
06:48:53.56 |
+33:03:47.4 |
HIP 32546 |
18.12 |
| 2026-06-08 00:00 |
06:50:05.02 |
+33:02:44.4 |
HIP 32791 |
11.69 |
| 2026-06-08 12:00 |
06:51:16.56 |
+33:01:39.4 |
HIP 32791 |
18.61 |
| 2026-06-09 00:00 |
06:52:28.16 |
+33:00:32.5 |
HIP 32999 |
12.78 |
| 2026-06-09 12:00 |
06:53:39.83 |
+32:59:23.5 |
HIP 33166 |
7.12 |
| 2026-06-10 00:00 |
06:54:51.58 |
+32:58:12.5 |
HIP 33166 |
8.20 |
| 2026-06-10 12:00 |
06:56:03.39 |
+32:56:59.5 |
HIP 33166 |
23.24 |
| 2026-06-11 00:00 |
06:57:15.27 |
+32:55:44.5 |
HIP 33557 |
25.43 |
| 2026-06-11 12:00 |
06:58:27.22 |
+32:54:27.5 |
HIP 33661 |
16.66 |
| 2026-06-12 00:00 |
06:59:39.23 |
+32:53:08.4 |
HIP 33661 |
10.39 |
| 2026-06-12 12:00 |
07:00:51.30 |
+32:51:47.3 |
HIP 33661 |
19.98 |
| 2026-06-13 00:00 |
07:02:03.44 |
+32:50:24.2 |
HIP 33943 |
23.20 |
| 2026-06-13 12:00 |
07:03:15.63 |
+32:48:59.1 |
HIP 33943 |
24.72 |
| 2026-06-14 00:00 |
07:04:27.89 |
+32:47:31.9 |
HIP 34311 |
29.88 |
| 2026-06-14 12:00 |
07:05:40.20 |
+32:46:02.7 |
HIP 34311 |
14.75 |
| 2026-06-15 00:00 |
07:06:52.56 |
+32:44:31.5 |
HIP 34311 |
2.90 |
| 2026-06-15 12:00 |
07:08:04.98 |
+32:42:58.2 |
HIP 34311 |
16.36 |
| 2026-06-16 00:00 |
07:09:17.45 |
+32:41:22.8 |
HIP 34663 |
18.55 |
| 2026-06-16 12:00 |
07:10:29.97 |
+32:39:45.4 |
HIP 34663 |
3.84 |
| 2026-06-17 00:00 |
07:11:42.54 |
+32:38:06.0 |
HIP 34700 |
5.96 |
| 2026-06-17 12:00 |
07:12:55.16 |
+32:36:24.5 |
HIP 34977 |
17.00 |
| 2026-06-18 00:00 |
07:14:07.82 |
+32:34:41.0 |
HIP 34977 |
6.11 |
| 2026-06-18 12:00 |
07:15:20.53 |
+32:32:55.4 |
HIP 34977 |
16.13 |
| 2026-06-19 00:00 |
07:16:33.28 |
+32:31:07.7 |
HIP 34977 |
30.98 |
| 2026-06-19 12:00 |
07:17:46.06 |
+32:29:18.0 |
HIP 35495 |
30.17 |
| 2026-06-20 00:00 |
07:18:58.89 |
+32:27:26.2 |
HIP 35495 |
23.42 |
| 2026-06-20 12:00 |
07:20:11.76 |
+32:25:32.3 |
HIP 35563 |
18.32 |
| 2026-06-21 00:00 |
07:21:24.66 |
+32:23:36.4 |
HIP 35563 |
21.19 |
| 2026-06-21 12:00 |
07:22:37.60 |
+32:21:38.4 |
HIP 35962 |
30.70 |
| 2026-06-22 00:00 |
07:23:50.57 |
+32:19:38.4 |
HIP 35962 |
19.82 |