메타데이터
| 항목 |
값 |
| Designation |
P/2006 HR30 (Siding Spring) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-01-02T06:46:18.693120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
3059 |
| NEO |
Yes |
| M1 |
13.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2006-11-07.0000000 |
| e |
0.84311855 |
| q (au) |
1.226428 |
| a (au) |
7.817544 |
| i (deg) |
31.884499 |
| Ω (om, deg) |
309.952160 |
| ω (w, deg) |
117.413876 |
| M (ma, deg) |
357.462130 |
밝기
산란 + 전체 선형
$$
M_a = (14.237 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.237 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.665 |
| k |
0.800 |
| 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 |
19:39:19.32 |
-38:02:42.8 |
HIP 96768 |
11.63 |
| 2026-06-01 12:00 |
19:39:07.47 |
-38:03:31.1 |
HIP 96768 |
13.47 |
| 2026-06-02 00:00 |
19:38:55.47 |
-38:04:19.1 |
HIP 96768 |
15.51 |
| 2026-06-02 12:00 |
19:38:43.31 |
-38:05:07.0 |
HIP 96768 |
17.70 |
| 2026-06-03 00:00 |
19:38:31.00 |
-38:05:54.6 |
HIP 96768 |
20.00 |
| 2026-06-03 12:00 |
19:38:18.53 |
-38:06:42.0 |
HIP 96768 |
22.38 |
| 2026-06-04 00:00 |
19:38:05.92 |
-38:07:29.2 |
HIP 96768 |
24.83 |
| 2026-06-04 12:00 |
19:37:53.15 |
-38:08:16.1 |
HIP 96404 |
27.22 |
| 2026-06-05 00:00 |
19:37:40.23 |
-38:09:02.8 |
HIP 96404 |
24.72 |
| 2026-06-05 12:00 |
19:37:27.16 |
-38:09:49.3 |
HIP 96404 |
22.24 |
| 2026-06-06 00:00 |
19:37:13.94 |
-38:10:35.4 |
HIP 96404 |
19.80 |
| 2026-06-06 12:00 |
19:37:00.57 |
-38:11:21.3 |
HIP 96404 |
17.42 |
| 2026-06-07 00:00 |
19:36:47.05 |
-38:12:06.9 |
HIP 96404 |
15.15 |
| 2026-06-07 12:00 |
19:36:33.39 |
-38:12:52.2 |
HIP 96404 |
13.06 |
| 2026-06-08 00:00 |
19:36:19.59 |
-38:13:37.1 |
HIP 96404 |
11.26 |
| 2026-06-08 12:00 |
19:36:05.64 |
-38:14:21.8 |
HIP 96404 |
9.95 |
| 2026-06-09 00:00 |
19:35:51.54 |
-38:15:06.1 |
HIP 96404 |
9.36 |
| 2026-06-09 12:00 |
19:35:37.31 |
-38:15:50.1 |
HIP 96404 |
9.63 |
| 2026-06-10 00:00 |
19:35:22.94 |
-38:16:33.7 |
HIP 96404 |
10.73 |
| 2026-06-10 12:00 |
19:35:08.42 |
-38:17:17.0 |
HIP 96322 |
10.50 |
| 2026-06-11 00:00 |
19:34:53.77 |
-38:17:59.8 |
HIP 96322 |
9.98 |
| 2026-06-11 12:00 |
19:34:38.98 |
-38:18:42.3 |
HIP 96322 |
10.34 |
| 2026-06-12 00:00 |
19:34:24.06 |
-38:19:24.4 |
HIP 96322 |
11.51 |
| 2026-06-12 12:00 |
19:34:09.00 |
-38:20:06.1 |
HIP 96322 |
13.30 |
| 2026-06-13 00:00 |
19:33:53.81 |
-38:20:47.4 |
HIP 96322 |
15.51 |
| 2026-06-13 12:00 |
19:33:38.49 |
-38:21:28.2 |
HIP 96119 |
17.19 |
| 2026-06-14 00:00 |
19:33:23.04 |
-38:22:08.6 |
HIP 96119 |
15.77 |
| 2026-06-14 12:00 |
19:33:07.47 |
-38:22:48.5 |
HIP 96119 |
14.86 |
| 2026-06-15 00:00 |
19:32:51.76 |
-38:23:28.0 |
HIP 96119 |
14.56 |
| 2026-06-15 12:00 |
19:32:35.93 |
-38:24:07.0 |
HIP 96119 |
14.93 |
| 2026-06-16 00:00 |
19:32:19.98 |
-38:24:45.5 |
HIP 96119 |
15.93 |
| 2026-06-16 12:00 |
19:32:03.91 |
-38:25:23.6 |
HIP 96119 |
17.47 |
| 2026-06-17 00:00 |
19:31:47.72 |
-38:26:01.1 |
HIP 96119 |
19.43 |
| 2026-06-17 12:00 |
19:31:31.41 |
-38:26:38.1 |
HIP 95956 |
21.04 |
| 2026-06-18 00:00 |
19:31:14.99 |
-38:27:14.6 |
HIP 95956 |
20.57 |
| 2026-06-18 12:00 |
19:30:58.45 |
-38:27:50.5 |
HIP 95956 |
20.61 |
| 2026-06-19 00:00 |
19:30:41.81 |
-38:28:25.9 |
HIP 95956 |
21.16 |
| 2026-06-19 12:00 |
19:30:25.05 |
-38:29:00.7 |
HIP 95956 |
22.20 |
| 2026-06-20 00:00 |
19:30:08.18 |
-38:29:35.0 |
HIP 95736 |
22.01 |
| 2026-06-20 12:00 |
19:29:51.21 |
-38:30:08.7 |
HIP 95736 |
19.13 |
| 2026-06-21 00:00 |
19:29:34.13 |
-38:30:41.8 |
HIP 95736 |
16.42 |
| 2026-06-21 12:00 |
19:29:16.96 |
-38:31:14.3 |
HIP 95736 |
13.98 |
| 2026-06-22 00:00 |
19:28:59.68 |
-38:31:46.2 |
HIP 95736 |
12.01 |