메타데이터
| 항목 |
값 |
| Designation |
C/2019 T3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-03-02T19:35:34.825920Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T11:42:49Z |
| Obs used |
1831 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
9.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-10-06T14:39:22.665600Z |
| Discovery magnitude (MPC) |
18.93 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-06-17.0000000 |
| e |
0.99811606 |
| q (au) |
5.946571 |
| a (au) |
3156.462242 |
| i (deg) |
121.862226 |
| Ω (om, deg) |
139.520856 |
| ω (w, deg) |
112.287720 |
| M (ma, deg) |
0.000590 |
밝기
산란 + 전체 선형
$$
M_a = (0.994 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
0.994 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.902 |
| k |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2019-01-17 |
2021-02-11 |
+8.5481 |
-6.673 |
| 2021-04-20 |
2022-07-29 |
-1.2800 |
+0.613 |
| 2022-07-29 |
2023-08-18 |
+15.5125 |
-13.337 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
20:30:17.22 |
-47:04:19.2 |
HIP 101151 |
9.73 |
| 2026-09-20 12:00 |
20:30:08.74 |
-47:04:15.8 |
HIP 101151 |
9.63 |
| 2026-09-21 00:00 |
20:30:00.37 |
-47:04:11.9 |
HIP 101151 |
9.73 |
| 2026-09-21 12:00 |
20:29:52.09 |
-47:04:07.4 |
HIP 101151 |
10.03 |
| 2026-09-22 00:00 |
20:29:43.90 |
-47:04:02.4 |
HIP 101151 |
10.49 |
| 2026-09-22 12:00 |
20:29:35.81 |
-47:03:56.8 |
HIP 101151 |
11.09 |
| 2026-09-23 00:00 |
20:29:27.82 |
-47:03:50.8 |
HIP 101151 |
11.81 |
| 2026-09-23 12:00 |
20:29:19.93 |
-47:03:44.2 |
HIP 100994 |
11.82 |
| 2026-09-24 00:00 |
20:29:12.14 |
-47:03:37.1 |
HIP 100994 |
10.90 |
| 2026-09-24 12:00 |
20:29:04.44 |
-47:03:29.5 |
HIP 100994 |
10.08 |
| 2026-09-25 00:00 |
20:28:56.84 |
-47:03:21.4 |
HIP 100994 |
9.37 |
| 2026-09-25 12:00 |
20:28:49.34 |
-47:03:12.8 |
HIP 100994 |
8.80 |
| 2026-09-26 00:00 |
20:28:41.94 |
-47:03:03.7 |
HIP 100994 |
8.38 |
| 2026-09-26 12:00 |
20:28:34.64 |
-47:02:54.1 |
HIP 100994 |
8.14 |
| 2026-09-27 00:00 |
20:28:27.44 |
-47:02:44.0 |
HIP 100994 |
8.07 |
| 2026-09-27 12:00 |
20:28:20.34 |
-47:02:33.4 |
HIP 100994 |
8.18 |
| 2026-09-28 00:00 |
20:28:13.34 |
-47:02:22.4 |
HIP 100945 |
7.62 |
| 2026-09-28 12:00 |
20:28:06.44 |
-47:02:10.9 |
HIP 100945 |
7.18 |
| 2026-09-29 00:00 |
20:27:59.64 |
-47:01:58.9 |
HIP 100945 |
6.91 |
| 2026-09-29 12:00 |
20:27:52.95 |
-47:01:46.4 |
HIP 100945 |
6.83 |
| 2026-09-30 00:00 |
20:27:46.35 |
-47:01:33.5 |
HIP 100945 |
6.92 |
| 2026-09-30 12:00 |
20:27:39.86 |
-47:01:20.2 |
HIP 100945 |
7.19 |
| 2026-10-01 00:00 |
20:27:33.47 |
-47:01:06.4 |
HIP 100945 |
7.60 |
| 2026-10-01 12:00 |
20:27:27.19 |
-47:00:52.1 |
HIP 100945 |
8.12 |
| 2026-10-02 00:00 |
20:27:21.00 |
-47:00:37.4 |
HIP 100945 |
8.73 |
| 2026-10-02 12:00 |
20:27:14.92 |
-47:00:22.3 |
HIP 100871 |
8.68 |
| 2026-10-03 00:00 |
20:27:08.95 |
-47:00:06.8 |
HIP 100871 |
8.40 |
| 2026-10-03 12:00 |
20:27:03.07 |
-46:59:50.8 |
HIP 100871 |
8.23 |
| 2026-10-04 00:00 |
20:26:57.31 |
-46:59:34.4 |
HIP 100871 |
8.19 |
| 2026-10-04 12:00 |
20:26:51.64 |
-46:59:17.5 |
HIP 100871 |
8.25 |
| 2026-10-05 00:00 |
20:26:46.09 |
-46:59:00.3 |
HIP 100871 |
8.43 |
| 2026-10-05 12:00 |
20:26:40.63 |
-46:58:42.7 |
HIP 100871 |
8.69 |
| 2026-10-06 00:00 |
20:26:35.29 |
-46:58:24.6 |
HIP 100871 |
9.04 |
| 2026-10-06 12:00 |
20:26:30.04 |
-46:58:06.2 |
HIP 100871 |
9.46 |
| 2026-10-07 00:00 |
20:26:24.91 |
-46:57:47.3 |
HIP 100871 |
9.93 |
| 2026-10-07 12:00 |
20:26:19.88 |
-46:57:28.1 |
HIP 100871 |
10.44 |
| 2026-10-08 00:00 |
20:26:14.95 |
-46:57:08.5 |
HIP 100871 |
10.99 |
| 2026-10-08 12:00 |
20:26:10.14 |
-46:56:48.5 |
HIP 100871 |
11.56 |
| 2026-10-09 00:00 |
20:26:05.42 |
-46:56:28.2 |
HIP 100871 |
12.15 |
| 2026-10-09 12:00 |
20:26:00.82 |
-46:56:07.5 |
HIP 100871 |
12.76 |
| 2026-10-10 00:00 |
20:25:56.32 |
-46:55:46.4 |
HIP 100871 |
13.37 |
| 2026-10-10 12:00 |
20:25:51.93 |
-46:55:24.9 |
HIP 100871 |
13.99 |
| 2026-10-11 00:00 |
20:25:47.65 |
-46:55:03.1 |
HIP 100871 |
14.61 |