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 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
19:41:01.49 |
-36:38:16.9 |
HIP 96932 |
14.35 |
| 2026-03-26 12:00 |
19:41:10.73 |
-36:38:30.7 |
HIP 96932 |
12.51 |
| 2026-03-27 00:00 |
19:41:19.85 |
-36:38:44.9 |
HIP 96932 |
10.69 |
| 2026-03-27 12:00 |
19:41:28.84 |
-36:38:59.5 |
HIP 96932 |
8.92 |
| 2026-03-28 00:00 |
19:41:37.71 |
-36:39:14.6 |
HIP 96932 |
7.19 |
| 2026-03-28 12:00 |
19:41:46.45 |
-36:39:30.1 |
HIP 96932 |
5.54 |
| 2026-03-29 00:00 |
19:41:55.06 |
-36:39:46.1 |
HIP 96932 |
4.02 |
| 2026-03-29 12:00 |
19:42:03.55 |
-36:40:02.5 |
HIP 96932 |
2.79 |
| 2026-03-30 00:00 |
19:42:11.91 |
-36:40:19.4 |
HIP 96932 |
2.34 |
| 2026-03-30 12:00 |
19:42:20.14 |
-36:40:36.7 |
HIP 96932 |
2.98 |
| 2026-03-31 00:00 |
19:42:28.24 |
-36:40:54.4 |
HIP 96932 |
4.22 |
| 2026-03-31 12:00 |
19:42:36.21 |
-36:41:12.6 |
HIP 96932 |
5.65 |
| 2026-04-01 00:00 |
19:42:44.05 |
-36:41:31.2 |
HIP 96932 |
7.15 |
| 2026-04-01 12:00 |
19:42:51.76 |
-36:41:50.3 |
HIP 96932 |
8.67 |
| 2026-04-02 00:00 |
19:42:59.34 |
-36:42:09.8 |
HIP 96932 |
10.18 |
| 2026-04-02 12:00 |
19:43:06.79 |
-36:42:29.7 |
HIP 96932 |
11.68 |
| 2026-04-03 00:00 |
19:43:14.10 |
-36:42:50.1 |
HIP 96932 |
13.17 |
| 2026-04-03 12:00 |
19:43:21.28 |
-36:43:10.9 |
HIP 96932 |
14.63 |
| 2026-04-04 00:00 |
19:43:28.32 |
-36:43:32.2 |
HIP 96932 |
16.08 |
| 2026-04-04 12:00 |
19:43:35.22 |
-36:43:53.9 |
HIP 96932 |
17.51 |
| 2026-04-05 00:00 |
19:43:41.99 |
-36:44:16.1 |
HIP 96932 |
18.91 |
| 2026-04-05 12:00 |
19:43:48.63 |
-36:44:38.7 |
HIP 96932 |
20.29 |
| 2026-04-06 00:00 |
19:43:55.12 |
-36:45:01.7 |
HIP 96932 |
21.64 |
| 2026-04-06 12:00 |
19:44:01.48 |
-36:45:25.2 |
HIP 96932 |
22.97 |
| 2026-04-07 00:00 |
19:44:07.70 |
-36:45:49.1 |
HIP 96932 |
24.28 |
| 2026-04-07 12:00 |
19:44:13.77 |
-36:46:13.4 |
HIP 96932 |
25.56 |
| 2026-04-08 00:00 |
19:44:19.71 |
-36:46:38.2 |
HIP 96932 |
26.82 |
| 2026-04-08 12:00 |
19:44:25.50 |
-36:47:03.4 |
HIP 96932 |
28.06 |
| 2026-04-09 00:00 |
19:44:31.15 |
-36:47:29.1 |
HIP 96932 |
29.26 |
| 2026-04-09 12:00 |
19:44:36.66 |
-36:47:55.2 |
HIP 96932 |
30.45 |
| 2026-04-10 00:00 |
19:44:42.03 |
-36:48:21.7 |
HIP 96932 |
31.61 |
| 2026-04-10 12:00 |
19:44:47.25 |
-36:48:48.7 |
HIP 96932 |
32.74 |
| 2026-04-11 00:00 |
19:44:52.32 |
-36:49:16.1 |
HIP 96932 |
33.85 |
| 2026-04-11 12:00 |
19:44:57.25 |
-36:49:43.9 |
HIP 97354 |
33.33 |
| 2026-04-12 00:00 |
19:45:02.03 |
-36:50:12.1 |
HIP 97354 |
32.28 |
| 2026-04-12 12:00 |
19:45:06.66 |
-36:50:40.8 |
HIP 97354 |
31.25 |
| 2026-04-13 00:00 |
19:45:11.15 |
-36:51:09.9 |
HIP 97354 |
30.25 |
| 2026-04-13 12:00 |
19:45:15.48 |
-36:51:39.5 |
HIP 97354 |
29.26 |
| 2026-04-14 00:00 |
19:45:19.67 |
-36:52:09.4 |
HIP 97354 |
28.29 |
| 2026-04-14 12:00 |
19:45:23.70 |
-36:52:39.8 |
HIP 97354 |
27.35 |
| 2026-04-15 00:00 |
19:45:27.58 |
-36:53:10.6 |
HIP 97354 |
26.42 |
| 2026-04-15 12:00 |
19:45:31.31 |
-36:53:41.8 |
HIP 97354 |
25.51 |
| 2026-04-16 00:00 |
19:45:34.89 |
-36:54:13.5 |
HIP 97354 |
24.62 |