메타데이터
| 항목 |
값 |
| Designation |
427P/ATLAS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-07-28T00:34:10.565760Z |
| Orbit solution date (soln_date, UTC) |
2026-06-09T11:12:48Z |
| Obs used |
442 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
19.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2021-06-09T01:43:41.059200Z |
| Discovery magnitude (MPC) |
24.00 G |
| Discovery observatory (MPC) |
I11 · Gemini South Observatory, Cerro Pachon |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-11-22.0000000 |
| e |
0.31304463 |
| q (au) |
2.178224 |
| a (au) |
3.170837 |
| i (deg) |
11.849363 |
| Ω (om, deg) |
252.391031 |
| ω (w, deg) |
99.944253 |
| M (ma, deg) |
20.419303 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 3.940\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
3.940 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.840 |
| 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) |
| 2026-09-25 00:00 |
12:42:19.89 |
-13:00:11.7 |
HIP 61910 |
15.57 |
| 2026-09-25 12:00 |
12:42:52.06 |
-13:03:02.7 |
HIP 62125 |
16.48 |
| 2026-09-26 00:00 |
12:43:24.27 |
-13:05:54.1 |
HIP 62125 |
8.14 |
| 2026-09-26 12:00 |
12:43:56.51 |
-13:08:45.7 |
HIP 62125 |
0.29 |
| 2026-09-27 00:00 |
12:44:28.78 |
-13:11:37.7 |
HIP 62125 |
8.58 |
| 2026-09-27 12:00 |
12:45:01.08 |
-13:14:30.0 |
HIP 62125 |
16.95 |
| 2026-09-28 00:00 |
12:45:33.41 |
-13:17:22.6 |
HIP 62125 |
25.33 |
| 2026-09-28 12:00 |
12:46:05.78 |
-13:20:15.5 |
HIP 62125 |
33.71 |
| 2026-09-29 00:00 |
12:46:38.17 |
-13:23:08.7 |
HIP 62125 |
42.10 |
| 2026-09-29 12:00 |
12:47:10.59 |
-13:26:02.1 |
HIP 62315 |
47.08 |
| 2026-09-30 00:00 |
12:47:43.05 |
-13:28:55.9 |
HIP 62315 |
47.37 |
| 2026-09-30 12:00 |
12:48:15.53 |
-13:31:49.9 |
HIP 62668 |
43.97 |
| 2026-10-01 00:00 |
12:48:48.04 |
-13:34:44.2 |
HIP 62747 |
38.60 |
| 2026-10-01 12:00 |
12:49:20.58 |
-13:37:38.8 |
HIP 62747 |
31.42 |
| 2026-10-02 00:00 |
12:49:53.15 |
-13:40:33.6 |
HIP 62747 |
25.02 |
| 2026-10-02 12:00 |
12:50:25.75 |
-13:43:28.8 |
HIP 62747 |
20.18 |
| 2026-10-03 00:00 |
12:50:58.37 |
-13:46:24.1 |
HIP 62747 |
18.20 |
| 2026-10-03 12:00 |
12:51:31.02 |
-13:49:19.7 |
HIP 62747 |
19.95 |
| 2026-10-04 00:00 |
12:52:03.70 |
-13:52:15.6 |
HIP 62747 |
24.66 |
| 2026-10-04 12:00 |
12:52:36.41 |
-13:55:11.7 |
HIP 62921 |
22.91 |
| 2026-10-05 00:00 |
12:53:09.14 |
-13:58:08.1 |
HIP 62973 |
15.62 |
| 2026-10-05 12:00 |
12:53:41.89 |
-14:01:04.6 |
HIP 62973 |
7.86 |
| 2026-10-06 00:00 |
12:54:14.67 |
-14:04:01.4 |
HIP 62973 |
4.85 |
| 2026-10-06 12:00 |
12:54:47.48 |
-14:06:58.5 |
HIP 62973 |
11.36 |
| 2026-10-07 00:00 |
12:55:20.31 |
-14:09:55.7 |
HIP 62973 |
19.47 |
| 2026-10-07 12:00 |
12:55:53.16 |
-14:12:53.2 |
HIP 62973 |
27.81 |
| 2026-10-08 00:00 |
12:56:26.04 |
-14:15:50.9 |
HIP 63257 |
22.39 |
| 2026-10-08 12:00 |
12:56:58.93 |
-14:18:48.7 |
HIP 63257 |
14.18 |
| 2026-10-09 00:00 |
12:57:31.85 |
-14:21:46.8 |
HIP 63257 |
6.73 |
| 2026-10-09 12:00 |
12:58:04.79 |
-14:24:45.0 |
HIP 63257 |
5.86 |
| 2026-10-10 00:00 |
12:58:37.76 |
-14:27:43.5 |
HIP 63257 |
12.97 |
| 2026-10-10 12:00 |
12:59:10.74 |
-14:30:42.1 |
HIP 63257 |
21.15 |
| 2026-10-11 00:00 |
12:59:43.74 |
-14:33:40.8 |
HIP 63436 |
22.54 |
| 2026-10-11 12:00 |
13:00:16.76 |
-14:36:39.8 |
HIP 63436 |
25.78 |
| 2026-10-12 00:00 |
13:00:49.80 |
-14:39:38.9 |
HIP 63665 |
30.35 |
| 2026-10-12 12:00 |
13:01:22.85 |
-14:42:38.2 |
HIP 63665 |
23.24 |
| 2026-10-13 00:00 |
13:01:55.93 |
-14:45:37.6 |
HIP 63665 |
17.47 |
| 2026-10-13 12:00 |
13:02:29.02 |
-14:48:37.1 |
HIP 63665 |
14.70 |
| 2026-10-14 00:00 |
13:03:02.12 |
-14:51:36.8 |
HIP 63665 |
16.52 |
| 2026-10-14 12:00 |
13:03:35.24 |
-14:54:36.6 |
HIP 63665 |
21.82 |
| 2026-10-15 00:00 |
13:04:08.38 |
-14:57:36.6 |
HIP 63665 |
28.73 |
| 2026-10-15 12:00 |
13:04:41.53 |
-15:00:36.6 |
HIP 63960 |
26.09 |
| 2026-10-16 00:00 |
13:05:14.70 |
-15:03:36.8 |
HIP 63960 |
19.49 |