메타데이터
| 항목 |
값 |
| Designation |
279P/La Sagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-10-09T20:52:39.947520Z |
| Orbit solution date (soln_date, UTC) |
2024-01-04T23:43:56Z |
| Obs used |
290 |
| NEO |
- |
| M1 |
16.000 |
| K1 |
8.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-10-26.0000000 |
| e |
0.39785019 |
| q (au) |
2.152931 |
| a (au) |
3.575408 |
| i (deg) |
5.051399 |
| Ω (om, deg) |
346.279437 |
| ω (w, deg) |
6.015546 |
| M (ma, deg) |
162.132940 |
밝기
산란 + 전체 선형
$$
M_a = (18.300 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.300 |
| n |
2.000 |
| gf |
0.969 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.307 |
| 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) |
| 2026-07-29 00:00 |
10:54:41.74 |
+06:40:24.2 |
HIP 53420 |
22.40 |
| 2026-07-29 12:00 |
10:55:03.23 |
+06:38:02.6 |
HIP 53420 |
21.59 |
| 2026-07-30 00:00 |
10:55:24.77 |
+06:35:40.6 |
HIP 53420 |
22.33 |
| 2026-07-30 12:00 |
10:55:46.37 |
+06:33:18.2 |
HIP 53531 |
22.38 |
| 2026-07-31 00:00 |
10:56:08.02 |
+06:30:55.4 |
HIP 53531 |
16.51 |
| 2026-07-31 12:00 |
10:56:29.72 |
+06:28:32.2 |
HIP 53531 |
10.61 |
| 2026-08-01 00:00 |
10:56:51.48 |
+06:26:08.6 |
HIP 53531 |
4.72 |
| 2026-08-01 12:00 |
10:57:13.28 |
+06:23:44.6 |
HIP 53531 |
1.33 |
| 2026-08-02 00:00 |
10:57:35.14 |
+06:21:20.2 |
HIP 53531 |
7.19 |
| 2026-08-02 12:00 |
10:57:57.05 |
+06:18:55.4 |
HIP 53531 |
13.14 |
| 2026-08-03 00:00 |
10:58:19.00 |
+06:16:30.2 |
HIP 53531 |
19.10 |
| 2026-08-03 12:00 |
10:58:41.01 |
+06:14:04.7 |
HIP 53531 |
25.08 |
| 2026-08-04 00:00 |
10:59:03.07 |
+06:11:38.7 |
HIP 53824 |
25.90 |
| 2026-08-04 12:00 |
10:59:25.17 |
+06:09:12.4 |
HIP 53824 |
20.05 |
| 2026-08-05 00:00 |
10:59:47.32 |
+06:06:45.8 |
HIP 53824 |
14.31 |
| 2026-08-05 12:00 |
11:00:09.52 |
+06:04:18.7 |
HIP 53824 |
8.96 |
| 2026-08-06 00:00 |
11:00:31.77 |
+06:01:51.3 |
HIP 53824 |
5.34 |
| 2026-08-06 12:00 |
11:00:54.06 |
+05:59:23.5 |
HIP 53845 |
1.10 |
| 2026-08-07 00:00 |
11:01:16.40 |
+05:56:55.4 |
HIP 53845 |
5.62 |
| 2026-08-07 12:00 |
11:01:38.78 |
+05:54:26.9 |
HIP 53845 |
11.66 |
| 2026-08-08 00:00 |
11:02:01.21 |
+05:51:58.0 |
HIP 53845 |
17.76 |
| 2026-08-08 12:00 |
11:02:23.68 |
+05:49:28.8 |
HIP 53845 |
23.87 |
| 2026-08-09 00:00 |
11:02:46.20 |
+05:46:59.2 |
HIP 54093 |
20.52 |
| 2026-08-09 12:00 |
11:03:08.76 |
+05:44:29.3 |
HIP 54093 |
15.98 |
| 2026-08-10 00:00 |
11:03:31.35 |
+05:41:59.1 |
HIP 54093 |
12.84 |
| 2026-08-10 12:00 |
11:03:54.00 |
+05:39:28.5 |
HIP 54109 |
10.36 |
| 2026-08-11 00:00 |
11:04:16.68 |
+05:36:57.6 |
HIP 54109 |
10.79 |
| 2026-08-11 12:00 |
11:04:39.40 |
+05:34:26.3 |
HIP 54109 |
14.22 |
| 2026-08-12 00:00 |
11:05:02.16 |
+05:31:54.8 |
HIP 54109 |
19.10 |
| 2026-08-12 12:00 |
11:05:24.96 |
+05:29:22.9 |
HIP 54313 |
19.14 |
| 2026-08-13 00:00 |
11:05:47.80 |
+05:26:50.7 |
HIP 54313 |
13.16 |
| 2026-08-13 12:00 |
11:06:10.67 |
+05:24:18.2 |
HIP 54313 |
7.58 |
| 2026-08-14 00:00 |
11:06:33.58 |
+05:21:45.3 |
HIP 54313 |
4.40 |
| 2026-08-14 12:00 |
11:06:56.53 |
+05:19:12.2 |
HIP 54313 |
7.71 |
| 2026-08-15 00:00 |
11:07:19.52 |
+05:16:38.8 |
HIP 54313 |
13.34 |
| 2026-08-15 12:00 |
11:07:42.53 |
+05:14:05.1 |
HIP 54313 |
19.38 |
| 2026-08-16 00:00 |
11:08:05.58 |
+05:11:31.1 |
HIP 54481 |
15.66 |
| 2026-08-16 12:00 |
11:08:28.67 |
+05:08:56.8 |
HIP 54481 |
10.36 |
| 2026-08-17 00:00 |
11:08:51.78 |
+05:06:22.2 |
HIP 54481 |
6.97 |
| 2026-08-17 12:00 |
11:09:14.93 |
+05:03:47.4 |
HIP 54481 |
8.34 |
| 2026-08-18 00:00 |
11:09:38.11 |
+05:01:12.3 |
HIP 54481 |
13.06 |
| 2026-08-18 12:00 |
11:10:01.32 |
+04:58:36.9 |
HIP 54481 |
18.76 |
| 2026-08-19 00:00 |
11:10:24.56 |
+04:56:01.2 |
HIP 54660 |
16.99 |