메타데이터
| 항목 |
값 |
| Designation |
P/2006 HR30 (Siding Spring) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-01-02T06:45:50.112000Z |
| Orbit solution date (soln_date, UTC) |
2026-07-15T15:12:02Z |
| Obs used |
3071 |
| NEO |
Yes |
| M1 |
13.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2006-11-23.0000000 |
| e |
0.84312260 |
| q (au) |
1.226429 |
| a (au) |
7.817755 |
| i (deg) |
31.884454 |
| Ω (om, deg) |
309.951928 |
| ω (w, deg) |
117.413810 |
| M (ma, deg) |
358.183689 |
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) |
| 2026-07-29 00:00 |
19:05:36.37 |
-38:35:16.5 |
HIP 93692 |
17.90 |
| 2026-07-29 12:00 |
19:05:18.01 |
-38:34:46.7 |
HIP 93692 |
16.68 |
| 2026-07-30 00:00 |
19:04:59.74 |
-38:34:16.1 |
HIP 93692 |
16.20 |
| 2026-07-30 12:00 |
19:04:41.54 |
-38:33:44.6 |
HIP 93692 |
16.52 |
| 2026-07-31 00:00 |
19:04:23.42 |
-38:33:12.3 |
HIP 93692 |
17.60 |
| 2026-07-31 12:00 |
19:04:05.38 |
-38:32:39.0 |
HIP 93692 |
19.30 |
| 2026-08-01 00:00 |
19:03:47.43 |
-38:32:04.9 |
HIP 93552 |
17.87 |
| 2026-08-01 12:00 |
19:03:29.57 |
-38:31:30.0 |
HIP 93552 |
16.47 |
| 2026-08-02 00:00 |
19:03:11.80 |
-38:30:54.2 |
HIP 93552 |
15.76 |
| 2026-08-02 12:00 |
19:02:54.12 |
-38:30:17.6 |
HIP 93552 |
15.79 |
| 2026-08-03 00:00 |
19:02:36.54 |
-38:29:40.1 |
HIP 93552 |
16.57 |
| 2026-08-03 12:00 |
19:02:19.05 |
-38:29:01.8 |
HIP 93552 |
17.99 |
| 2026-08-04 00:00 |
19:02:01.67 |
-38:28:22.7 |
HIP 93552 |
19.90 |
| 2026-08-04 12:00 |
19:01:44.38 |
-38:27:42.7 |
HIP 93552 |
22.17 |
| 2026-08-05 00:00 |
19:01:27.19 |
-38:27:01.9 |
HIP 93552 |
24.69 |
| 2026-08-05 12:00 |
19:01:10.11 |
-38:26:20.3 |
HIP 93552 |
27.39 |
| 2026-08-06 00:00 |
19:00:53.14 |
-38:25:37.9 |
HIP 93552 |
30.21 |
| 2026-08-06 12:00 |
19:00:36.27 |
-38:24:54.7 |
HIP 93447 |
31.59 |
| 2026-08-07 00:00 |
19:00:19.52 |
-38:24:10.6 |
HIP 93099 |
31.04 |
| 2026-08-07 12:00 |
19:00:02.88 |
-38:23:25.8 |
HIP 93099 |
27.81 |
| 2026-08-08 00:00 |
18:59:46.35 |
-38:22:40.2 |
HIP 93099 |
24.61 |
| 2026-08-08 12:00 |
18:59:29.95 |
-38:21:53.7 |
HIP 93099 |
21.47 |
| 2026-08-09 00:00 |
18:59:13.66 |
-38:21:06.5 |
HIP 93099 |
18.40 |
| 2026-08-09 12:00 |
18:58:57.49 |
-38:20:18.6 |
HIP 93099 |
15.43 |
| 2026-08-10 00:00 |
18:58:41.45 |
-38:19:29.8 |
HIP 93099 |
12.61 |
| 2026-08-10 12:00 |
18:58:25.53 |
-38:18:40.3 |
HIP 93099 |
10.07 |
| 2026-08-11 00:00 |
18:58:09.74 |
-38:17:50.0 |
HIP 93099 |
8.03 |
| 2026-08-11 12:00 |
18:57:54.07 |
-38:16:59.0 |
HIP 93099 |
6.92 |
| 2026-08-12 00:00 |
18:57:38.54 |
-38:16:07.2 |
HIP 93099 |
7.17 |
| 2026-08-12 12:00 |
18:57:23.14 |
-38:15:14.7 |
HIP 93099 |
8.63 |
| 2026-08-13 00:00 |
18:57:07.88 |
-38:14:21.5 |
HIP 93099 |
10.81 |
| 2026-08-13 12:00 |
18:56:52.76 |
-38:13:27.5 |
HIP 93099 |
13.34 |
| 2026-08-14 00:00 |
18:56:37.77 |
-38:12:32.8 |
HIP 93099 |
16.05 |
| 2026-08-14 12:00 |
18:56:22.92 |
-38:11:37.4 |
HIP 93099 |
18.84 |
| 2026-08-15 00:00 |
18:56:08.21 |
-38:10:41.3 |
HIP 93099 |
21.68 |
| 2026-08-15 12:00 |
18:55:53.65 |
-38:09:44.5 |
HIP 93099 |
24.54 |
| 2026-08-16 00:00 |
18:55:39.23 |
-38:08:47.0 |
HIP 92734 |
23.89 |
| 2026-08-16 12:00 |
18:55:24.96 |
-38:07:48.8 |
HIP 92734 |
20.94 |
| 2026-08-17 00:00 |
18:55:10.84 |
-38:06:49.9 |
HIP 92734 |
18.02 |
| 2026-08-17 12:00 |
18:54:56.87 |
-38:05:50.4 |
HIP 92734 |
15.12 |
| 2026-08-18 00:00 |
18:54:43.04 |
-38:04:50.2 |
HIP 92734 |
12.26 |
| 2026-08-18 12:00 |
18:54:29.37 |
-38:03:49.4 |
HIP 92734 |
9.44 |
| 2026-08-19 00:00 |
18:54:15.86 |
-38:02:47.9 |
HIP 92734 |
6.69 |