메타데이터
| 항목 |
값 |
| Designation |
C/1998 H1 (Stonehouse) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-04-14T10:13:23.263680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:53Z |
| Obs used |
407 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
9.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1998-05-13.0000000 |
| e |
0.99794041 |
| q (au) |
1.487291 |
| a (au) |
722.129549 |
| i (deg) |
104.692960 |
| Ω (om, deg) |
222.109070 |
| ω (w, deg) |
1.325283 |
| M (ma, deg) |
0.001451 |
밝기
산란 + 전체 선형
$$
M_a = (11.349 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.349 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.506 |
| k |
1.000 |
| 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 |
02:37:30.03 |
+33:54:32.4 |
HIP 12193 |
22.08 |
| 2026-09-20 12:00 |
02:37:28.07 |
+33:54:31.5 |
HIP 12193 |
21.99 |
| 2026-09-21 00:00 |
02:37:26.10 |
+33:54:30.5 |
HIP 12193 |
21.91 |
| 2026-09-21 12:00 |
02:37:24.11 |
+33:54:29.3 |
HIP 12193 |
21.84 |
| 2026-09-22 00:00 |
02:37:22.10 |
+33:54:28.0 |
HIP 12193 |
21.78 |
| 2026-09-22 12:00 |
02:37:20.08 |
+33:54:26.6 |
HIP 12193 |
21.73 |
| 2026-09-23 00:00 |
02:37:18.04 |
+33:54:25.0 |
HIP 12193 |
21.69 |
| 2026-09-23 12:00 |
02:37:15.98 |
+33:54:23.3 |
HIP 12193 |
21.65 |
| 2026-09-24 00:00 |
02:37:13.91 |
+33:54:21.5 |
HIP 12193 |
21.63 |
| 2026-09-24 12:00 |
02:37:11.83 |
+33:54:19.5 |
HIP 12193 |
21.62 |
| 2026-09-25 00:00 |
02:37:09.73 |
+33:54:17.4 |
HIP 12193 |
21.62 |
| 2026-09-25 12:00 |
02:37:07.61 |
+33:54:15.2 |
HIP 12193 |
21.63 |
| 2026-09-26 00:00 |
02:37:05.48 |
+33:54:12.8 |
HIP 12193 |
21.65 |
| 2026-09-26 12:00 |
02:37:03.33 |
+33:54:10.3 |
HIP 12193 |
21.69 |
| 2026-09-27 00:00 |
02:37:01.17 |
+33:54:07.7 |
HIP 12193 |
21.73 |
| 2026-09-27 12:00 |
02:36:58.99 |
+33:54:04.9 |
HIP 12193 |
21.79 |
| 2026-09-28 00:00 |
02:36:56.80 |
+33:54:02.0 |
HIP 12193 |
21.85 |
| 2026-09-28 12:00 |
02:36:54.60 |
+33:53:59.0 |
HIP 12193 |
21.93 |
| 2026-09-29 00:00 |
02:36:52.38 |
+33:53:55.8 |
HIP 12193 |
22.02 |
| 2026-09-29 12:00 |
02:36:50.15 |
+33:53:52.5 |
HIP 12193 |
22.13 |
| 2026-09-30 00:00 |
02:36:47.90 |
+33:53:49.1 |
HIP 12193 |
22.24 |
| 2026-09-30 12:00 |
02:36:45.64 |
+33:53:45.5 |
HIP 12193 |
22.37 |
| 2026-10-01 00:00 |
02:36:43.36 |
+33:53:41.8 |
HIP 12193 |
22.51 |
| 2026-10-01 12:00 |
02:36:41.07 |
+33:53:38.0 |
HIP 12193 |
22.66 |
| 2026-10-02 00:00 |
02:36:38.77 |
+33:53:34.0 |
HIP 12193 |
22.82 |
| 2026-10-02 12:00 |
02:36:36.46 |
+33:53:29.9 |
HIP 12193 |
22.99 |
| 2026-10-03 00:00 |
02:36:34.13 |
+33:53:25.7 |
HIP 12193 |
23.18 |
| 2026-10-03 12:00 |
02:36:31.79 |
+33:53:21.3 |
HIP 12193 |
23.37 |
| 2026-10-04 00:00 |
02:36:29.44 |
+33:53:16.8 |
HIP 12193 |
23.58 |
| 2026-10-04 12:00 |
02:36:27.07 |
+33:53:12.1 |
HIP 11981 |
23.74 |
| 2026-10-05 00:00 |
02:36:24.69 |
+33:53:07.3 |
HIP 11981 |
23.25 |
| 2026-10-05 12:00 |
02:36:22.30 |
+33:53:02.4 |
HIP 11981 |
22.76 |
| 2026-10-06 00:00 |
02:36:19.90 |
+33:52:57.4 |
HIP 11981 |
22.27 |
| 2026-10-06 12:00 |
02:36:17.49 |
+33:52:52.2 |
HIP 11981 |
21.78 |
| 2026-10-07 00:00 |
02:36:15.06 |
+33:52:46.9 |
HIP 11981 |
21.29 |
| 2026-10-07 12:00 |
02:36:12.63 |
+33:52:41.4 |
HIP 11981 |
20.80 |
| 2026-10-08 00:00 |
02:36:10.18 |
+33:52:35.9 |
HIP 11981 |
20.30 |
| 2026-10-08 12:00 |
02:36:07.72 |
+33:52:30.2 |
HIP 11981 |
19.81 |
| 2026-10-09 00:00 |
02:36:05.25 |
+33:52:24.3 |
HIP 11981 |
19.31 |
| 2026-10-09 12:00 |
02:36:02.77 |
+33:52:18.3 |
HIP 11981 |
18.82 |
| 2026-10-10 00:00 |
02:36:00.28 |
+33:52:12.2 |
HIP 11981 |
18.32 |
| 2026-10-10 12:00 |
02:35:57.78 |
+33:52:06.0 |
HIP 11981 |
17.82 |
| 2026-10-11 00:00 |
02:35:55.27 |
+33:51:59.6 |
HIP 11981 |
17.33 |