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) |
| 2026-06-01 00:00 |
02:36:19.56 |
+33:20:12.0 |
HIP 12200 |
28.49 |
| 2026-06-01 12:00 |
02:36:21.85 |
+33:20:24.7 |
HIP 12200 |
28.53 |
| 2026-06-02 00:00 |
02:36:24.14 |
+33:20:37.5 |
HIP 12200 |
28.58 |
| 2026-06-02 12:00 |
02:36:26.42 |
+33:20:50.4 |
HIP 12200 |
28.64 |
| 2026-06-03 00:00 |
02:36:28.68 |
+33:21:03.3 |
HIP 12200 |
28.71 |
| 2026-06-03 12:00 |
02:36:30.94 |
+33:21:16.2 |
HIP 12328 |
28.44 |
| 2026-06-04 00:00 |
02:36:33.18 |
+33:21:29.1 |
HIP 12328 |
27.94 |
| 2026-06-04 12:00 |
02:36:35.41 |
+33:21:42.1 |
HIP 12328 |
27.45 |
| 2026-06-05 00:00 |
02:36:37.64 |
+33:21:55.0 |
HIP 12328 |
26.96 |
| 2026-06-05 12:00 |
02:36:39.85 |
+33:22:08.1 |
HIP 12328 |
26.48 |
| 2026-06-06 00:00 |
02:36:42.04 |
+33:22:21.1 |
HIP 12328 |
26.00 |
| 2026-06-06 12:00 |
02:36:44.23 |
+33:22:34.2 |
HIP 12328 |
25.52 |
| 2026-06-07 00:00 |
02:36:46.41 |
+33:22:47.3 |
HIP 12328 |
25.05 |
| 2026-06-07 12:00 |
02:36:48.57 |
+33:23:00.4 |
HIP 12328 |
24.58 |
| 2026-06-08 00:00 |
02:36:50.72 |
+33:23:13.6 |
HIP 12328 |
24.11 |
| 2026-06-08 12:00 |
02:36:52.86 |
+33:23:26.8 |
HIP 12328 |
23.65 |
| 2026-06-09 00:00 |
02:36:54.99 |
+33:23:40.0 |
HIP 12328 |
23.19 |
| 2026-06-09 12:00 |
02:36:57.10 |
+33:23:53.2 |
HIP 12328 |
22.74 |
| 2026-06-10 00:00 |
02:36:59.20 |
+33:24:06.5 |
HIP 12328 |
22.29 |
| 2026-06-10 12:00 |
02:37:01.29 |
+33:24:19.7 |
HIP 12328 |
21.84 |
| 2026-06-11 00:00 |
02:37:03.36 |
+33:24:33.0 |
HIP 12328 |
21.40 |
| 2026-06-11 12:00 |
02:37:05.43 |
+33:24:46.3 |
HIP 12328 |
20.97 |
| 2026-06-12 00:00 |
02:37:07.47 |
+33:24:59.7 |
HIP 12328 |
20.54 |
| 2026-06-12 12:00 |
02:37:09.51 |
+33:25:13.0 |
HIP 12328 |
20.11 |
| 2026-06-13 00:00 |
02:37:11.53 |
+33:25:26.4 |
HIP 12328 |
19.69 |
| 2026-06-13 12:00 |
02:37:13.54 |
+33:25:39.7 |
HIP 12328 |
19.28 |
| 2026-06-14 00:00 |
02:37:15.53 |
+33:25:53.1 |
HIP 12328 |
18.87 |
| 2026-06-14 12:00 |
02:37:17.51 |
+33:26:06.5 |
HIP 12328 |
18.46 |
| 2026-06-15 00:00 |
02:37:19.48 |
+33:26:19.9 |
HIP 12328 |
18.07 |
| 2026-06-15 12:00 |
02:37:21.43 |
+33:26:33.3 |
HIP 12328 |
17.68 |
| 2026-06-16 00:00 |
02:37:23.36 |
+33:26:46.8 |
HIP 12328 |
17.29 |
| 2026-06-16 12:00 |
02:37:25.28 |
+33:27:00.2 |
HIP 12328 |
16.92 |
| 2026-06-17 00:00 |
02:37:27.19 |
+33:27:13.7 |
HIP 12328 |
16.55 |
| 2026-06-17 12:00 |
02:37:29.08 |
+33:27:27.1 |
HIP 12328 |
16.19 |
| 2026-06-18 00:00 |
02:37:30.96 |
+33:27:40.6 |
HIP 12328 |
15.83 |
| 2026-06-18 12:00 |
02:37:32.82 |
+33:27:54.0 |
HIP 12328 |
15.49 |
| 2026-06-19 00:00 |
02:37:34.67 |
+33:28:07.5 |
HIP 12328 |
15.15 |
| 2026-06-19 12:00 |
02:37:36.50 |
+33:28:20.9 |
HIP 12328 |
14.83 |
| 2026-06-20 00:00 |
02:37:38.31 |
+33:28:34.4 |
HIP 12328 |
14.51 |
| 2026-06-20 12:00 |
02:37:40.11 |
+33:28:47.9 |
HIP 12328 |
14.20 |
| 2026-06-21 00:00 |
02:37:41.89 |
+33:29:01.3 |
HIP 12328 |
13.90 |
| 2026-06-21 12:00 |
02:37:43.66 |
+33:29:14.8 |
HIP 12328 |
13.61 |
| 2026-06-22 00:00 |
02:37:45.41 |
+33:29:28.3 |
HIP 12328 |
13.34 |